grams of methanol and 75 grams of ethanol ? Using Raoult's law, calculate the mole fra. Explanation: Thus at room temperature, the substance with the lowest boiling point will have the highest vapor pressure (easiest to get into the gas phase). The enthalpy of vaporization of methanol is 35.27 kJ mol-1 at its boiling point of 64.1C. What is the partial pressure of He? What is the vapor pressure, at 28.0 degree C of a solution made by, At 227 degrees C, carbon monoxide gas reacts with hydrogen gas to form one mole of methanol, CH3OH(g). The cookie is used to store the user consent for the cookies in the category "Analytics". Water has a vapour pressure of 23.76 torr at 25 degree C. What is the vapour pressure of a solution of sucrose ,if its mole fraction is 0.25? b) Calculate the normal boiling point of this liquid. Calculate the equilibrium partial pressures of H2, Cl2, and HCl if the total pressure is 1.65 atm. The vapor pressure of the resulting solution is \\ a) 123 torr b) 94.2 torr c) 65.8 torr d) 61.3 torr e) none. What is the total pressure of the mixtu, A sample of O_2 gas was collected over water at 23 degrees C and 731 torr. What is the total vapor pressure (ie. Calculate the partial pressure of each gas, the total pressure, and the composition of the mixture in mole percent. A cocktail was prepared by mixing 20.0 grams of ethanol with 150 grams of water at 25 degrees Celsius. What is the vapor pressure at 17 degree celsius? Plot a vapor pressure curve for GaCl3 from the following vapor pressures. P_methanol = 94 toor P_ethanol = 44 toor nCH_3OH = w/gmw = 32.4/32.043 = 1.01114 n_c_2H_5OH = w/gmw = 23.9/46.01 = 0.5187 \r\n S_CH_3OH = n_CH_3OH/(nCH_3OH + nC_2H_5OH) = 1.01114/(1.01114 + 0.5187) = 1.01114/1.5299 = 0.66091 SC_2H_5OH = 1 - 0.66091 = 0.339 (therefore SA + SB = 1) P_total = 94 times 0.66091 + 0.339 times 44 = 62.125 + 14.91 = 77.03554 toor we get P_total = 77.03554toor. psolution = Xmethanol*Po 642.3 = Xmethanol*760 Methanol (methyl alcohol, carbinol, wood alcohol, wood naptha or wood spirits) is a chemical compound with chemical formula CH3OH. A solution of methanol and water has a total vapor pressure of 35.5 torr at 20 C. Calculate the mole fraction of methanol in this solution. At 40C, heptane has a vapor pressure of about 92.2 torr and octane has a vapor pressure of about 31.2 torr. Our experts can answer your tough homework and study questions. {/eq}. Calculate the mass of ethylene glycol (b) Ethanol and methanol form a solution that behaves like an ideal solution. These applications will - due to browser restrictions - send data between your browser and our server. Explain. What is the vapor pressure of ethanol at 60 C? 1. Use the Clausius-Clapeyron equation to solve this problem. What liquid has the highest vapor pressure? water. The vapor pressure of methanol (32.043 g/mol), CH_3OH, is 94 torr at 20^o C. The vapor pressure of ethanol (46.07 g/mol), C_2H_5OH, is 44 torr at the same temperature. Why ethanol has the higher vapor pressure than methanol? These cookies track visitors across websites and collect information to provide customized ads. The vapor pressure of ethanol is 54.68 mmHg at 25 degrees Celsius. What is the vapor pressure at 17 degree celsius? Explain the reasons for the difference in the two procedures. The vapor pressure of water at this temperature is 26.02 torr. Then, the solution is allowed to reach equilibrium with its. Which of the following gases is expected to be most soluble in water? We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. propanol are 303 and 44.6 torr, respectively. Assume the solution obeys Raoult's Law I haven't a clue what to do for this problem. A mixture of benzene and acetone has a vapor pressure of 196 torr at room temperature (25 degrees Celsius). A solution containing a nonvolatile solute dissolved in methanol has a vapor pressure of 713.8 torr at 64.7C. ), Equal moles of pure liquid benzene (vapor pressure of 94.2 torr) and pure liquid toluene (vapor pressure of 28.4 torr) are mixed together. (CH3CH2CH2OH) solution that has a vapor 1) Consider the equilibrium of methanol vapor and the liquid. Calculate S for 1 mol of Hg vapor at 298.15 K if its pressure at that temperature is 0.001960 torr. the vapour pressure of pure methanol is 86.2 torr. The vapor pressures of pure methan ol and pure water at this temperature are 256 torr and 55.3 torr, respectively. Explanation: Thus at room temperature, the substance with the lowest boiling point will have the highest vapor pressure (easiest to get into the gas phase). This cookie is set by GDPR Cookie Consent plugin. The vapor pressure of ethanol (CH3OH) at 20C is 44 mmHg, and the vapor pressure of methanol (CH3OH) at the same temperature is 94 mmHg. What is the mole fraction of each component in the liquid mixture of 10.5 g of CHCl_3 and 35.5 g of CH_2Cl_2? The mole fraction of methanol and ethanol of a solution is: \({\rm{Mole}}\;{\rm{ = }}\;\dfrac{{{{\rm{X}}_{\rm{A}}}}}{{{{\rm{X}}_{\rm{A}}}{\rm{ + }}{{\rm{X}}_{\rm{B}}}}}\), \(\begin{aligned}{\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{OH}} &= \;{\rm{32}}{\rm{.04246}}\;{\rm{g}}\;{\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}\\{{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{OH}} &= \;{\rm{46}}{\rm{.063}}\;{\rm{g}}\,{\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}\end{aligned}\), \(\begin{aligned}{\rm{Mole}}\;{\rm{of}}\;{\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{OH}} &= \;\dfrac{{{\rm{50}}{\rm{.0}}\;{\rm{g}}}}{{{\rm{32}}{\rm{.04246}}\;{\rm{g}}\;{\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}}}\\{\rm{Mole}}\;{\rm{of}}\;{\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{OH}} &= \;{\rm{1}}{\rm{.5604}}\;{\rm{mole}}\end{aligned}\), \(\begin{aligned}{\rm{Mole}}\;{\rm{of}}\;{{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{OH}} &=\;\dfrac{{{\rm{50}}{\rm{.0}}\;{\rm{g}}}}{{{\rm{46}}{\rm{.063}}\;{\rm{g}}\;{\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}}}\\{\rm{Mole}}\;{\rm{of}}\;{\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{OH}}\ &= \;{\rm{1}}{\rm{.0853}}\;{\rm{mole}}\end{aligned}\), \(\begin{aligned}{{\rm{X}}_{{\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{OH}}}} &= \;\frac{{{\rm{1}}{\rm{.5604}}}}{{\left( {{\rm{1}}{\rm{.5604 + 1}}{\rm{.0853}}} \right)}}\\{{\rm{X}}_{{\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{OH}}}} &= \;{\rm{0}}{\rm{.590}}\\{{\rm{X}}_{{{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{OH}}}} &= \;\dfrac{{{\rm{1}}{\rm{.0853}}}}{{\left( {{\rm{1}}{\rm{.5604 + 1}}{\rm{.0853}}} \right)}}\\{{\rm{X}}_{{{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{OH}}}} &= \;{\rm{0}}{\rm{.410}}\end{aligned}\), \(\begin{aligned}{{\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{OH: 0}}{\rm{.590 \times 94 torr = 55 torr}}}\\{{\rm{C}}_{\rm{2}}{{\rm{H}}_{\rm{5}}}{\rm{OH: 0}}{\rm{.410 \times 44 torr = 18 torr}}}\end{aligned}\). mega construx halo chopper takedown /; April 10, 2022 Explanation: Experiments show that the vapour pressure P, enthalpy of vaporization, H vap, and temperature T are related by the equation lnP = constant- H vap RT where R is the ideal gas constant. A mixture of gases has the following partial pressure for the component gases at 20 degrees Celsius: Oxygen 180.0 torr, Nitrogen 3200 torr, and Hydrogen 246.0 torr. What is the thermal conductivity of methanol? The partial pressure of the O2 is 78.00 torr. Vapor pressure of Methanol = {eq}\rm P^o_{CH_3OH} = 406\ torr What is its heat of vaporization? We also use third-party cookies that help us analyze and understand how you use this website. (Vapour pressure of H_2O at 25 degree C is 23.8 torr). \chi_{C_2H_5OH} = 0.412 What is the specific heat capacity of methanol? (The vapor pressure of water at 23 degrees C is 21.2 torr. What is its vapor pressure at 57.5 degrees Celsius? is 175 torr., while that of acetonitrile, CH_3CN, is 102 torr. Question:The vapor pressure of methanol (32.043 g/mol), CH3OH, If I collect a gas over this water, and the total gas pressure of the gas solution is found to be 277.9 torr, what would be the pressure of the pure gas? copyright 2003-2023 Homework.Study.com. What is the vapor pressure (in torr) at 81.3 degrees Celsius? National Institutes of Health. What is the vapor pressure of methanol at room temperature? Its vapor pressure at 20C is 58.96 kPa. The density of pure ethanol is 0.789 g/mL. Chat now for more business. {eq}\rm P_{total} = P_1 + P_2 + P_3 ----- These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. prepared by dissolving 235 g ethanol (M = 46 g/mol) in 500 mL of Calculate mole fraction of A at which 2 liquids have equal partial pressure. So, for example, methanol has a vapor pressure of 94 torr at 25 C, and ethanol has a vapor pressure of 44 torr at 25 C. The vapor pressure of methanol at 25.C. A sample of O_2 gas was collected over water at 23 degrees C and 731 torr. Still looking for help? The vapor pressure of pure benzene and toluene at, At a certain temperature the vapor pressure of pure benzene is measured to be 322 torr . (The vapor pressure of water at 23 degrees C is 21.2 torr.). 20.06 torr Google use cookies for serving our ads and handling visitor statistics. If the vapor pressure of water is 17.5 torr at 20 degC, what is the water vapor pressure inside a bottle of 100 proof whiskey? pressure at 20 degrees celcius of a solution prepared by mixing 25 What is the partial pressure of the hydrogen gas? , in 0.250 kg of benzene, if the solution boils at 83.5 C. \chi_{CH_3OH} + P^\circ_{C_2H_5OH} . The vapor pressure of water at 0 is 4.58 torr? If you stil . Explain your reasoning. Pure water has a vapor pressure of 23.76 torr. Calculate the vapor pressure in kPa. 5 I 5. Determine the vapor pressure of a solution composed of 1.00 mol of liquid A and 3.00 mol of liquid B. (delta H_{vap} for ethanol is 39.3 kJ/mol.). Ethanol has a density of 0.789 g/cm^3 and a vapor pressure of 5.95 kPa at 20.0 degrees Celsius. A sample of water vapor at 10.0 Torr and 300.0 K has a measured molar volume of 1870.9 mol^-1. At 25 degrees Celsius, the vapor pressure of pure pentane is 511 torr and that of hexane is 150 torr. Ans . Substance A. How do you find density in the ideal gas law. Water has a vapour pressure of 23.76 torr at 25 degree C. What is the vapour pressure of a solution of sucrose ,if its mole fraction is 0.25? Der Dampfdruck ist der Druck, der sich einstellt, wenn sich in einem abgeschlossenen System ein Dampf mit der zugehrigen flssigen Phase im thermodynamischen Gleichgewicht befindet. Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro .Add the Engineering ToolBox extension to your SketchUp from the SketchUp Pro Sketchup Extension Warehouse! The vapor pressures of pure liquid A and pure liquid B are 45.9 torr and 99.2 torr, respectively. At 25 degrees C, the vapor pressure of CHCl_3 is 205 mmHg and the vapor pressure of CH_2Cl_2 is 415 mmHg. If 4.4 g of urea is mixed with 39.9 g of methanol, calculate the vapor pressure of the methanol solution. Pvap= 94% of StudySmarter users get better grades. Solution: 1) 18.2 % means this: 18.2 g solute in 100 g of solution. What would be the new vapor pressure? Assume the density of the mixture is the same as that of the solvent. {/eq}, {eq}\rm x_{C_2H_5OH} = \dfrac{n_{C_2H_5OH}}{n_{CH_3OH} + n_{C_2H_5OH}} \\ its vapor pressure by 10.0 torr at 35 degree C. The vapor pressure The solution is then allowed to reach equilibrium with i. A certain liquid has a vapor pressure of 92.0 torr at 23.0 degrees Celsius and 375.0 torr at 45.0 degrees Celsius. The basic fabrication technique includes low-pressure chemical vapor deposited SnO 2 , chemical-bath deposited CdS, close-spaced sublimated CdTe, solution-CdCl 2 treatment, and an acid-contact. vapor pressure of methanol at 12.0C = 75.09 torr Explanation: Using Clausius Clapeyron equation , we have that ln (P2/P1)= (Hvap /R) (1/T1 - 1/T2) Given At Normal boiling point, Temperature T1= 64.6C = 64.6 + 273 = 337.6 K, Pressure,P1 = 1 atm Heat of vaporization = 35.2 kJ/mol Changing to J/mol =35.2 x 1000= 35200 J/mol Look it up and solve. KIMS conducts a wide range of technological R&D activities, including process improvements, application development, material enhancement, testing, and Okay, So the total pressure is going to be equal to the mole fraction of ethanol to zero 542 Times the vapor pressure of ethanol, which is 45 0.0 tour. Calculate the total vapor pressure above a solution of 45.3 g of methanol and 45.5 g o. The Delta Hvap of water is 40.7 kJ/mol. Analytical cookies are used to understand how visitors interact with the website. Calculate the vapor pressure of octane at 38 degrees Celsius knowing that Delta Hvap = 40 kJ/mol and octane has a vapor pressure of 13.95 torr at 25 degrees Celsius and vapor pressure of 144.78 torr at 75 degrees Celsius. For example, suppose a mixture contains two gases, A and B. P soln. At ambient pressure and temperature the isobaric specific heat, CP, of liquid methanol is 2.53 [kJ/kg K] or 0.605 [Btu/lb F] = [cal/g K] , while the isochoric specific heat, CV, is 2.12 [kJ/kg K] or 0.506 [Btu/lb F] = [cal/g K] . This cookie is set by GDPR Cookie Consent plugin. A 1.0 m solution of HCl in benzene has a freezing point of 0.4 C. Now, calculate the mole fraction of methanol and ethanol by using moles of methanol and ethanol, Mole fraction of methanol is calculated as -, {eq}\rm \chi_{CH_3OH} = \frac{n_{CH_3OH}}{n_{CH_3OH} + n_{C_2H_5OH}} State any approximations made. (CH3CH2CH2OH) solution that has a vapor pressure of 187 torr at What is the vapor pressure, at 28.0 degrees Celsius, of a solution made by mixing 0.250 moles of carbon disulfide and 0. What is its heat of vaporization? At 40 C, heptane has a vapor pressure of about 92.0 torr and octane has a vapor pressure of about 31.2 torr. The vapor pressure of ethanol (46.07 g/mol), According to Raoult's Law, the vapor pressure of a solution of two volatile components can be calculated by the formula. a. 44.4 torr, Butanone (CH3CH2COCH3) has a vapor pressure of 100 Torr at 25 degrees C; at the same temperature, propanone (CH3COCH3) has a vapor pressure of 222 Torr. Everything you need for your studies in one place. The methods disclosed are suitable for removing the solvents with a broad range of volatility, having normal (STP) boiling points from 30 up to at least 202 C. (vapor pressures at least of 0.1 to 500 torr; higher boiling point . The vapor pressure of liquid benzene at a given temperature can be computed from the following empirical formula. At this temperature, a solution is made where the mole fractions of A and B are equal. What is the vapor pressure at 85^oC of a solution prepared from 100 mL of water (density 1.00 g/mL ) and 150 g of diglyme, C_6H_{14}O_3, a nonvo, At 25 degrees Celsius, the vapor pressure of pure pentane is 511 torr and that of hexane is 150 torr. Calculate its vapor pressure at 275.7 K. What formula would you use to calculate the vapor pressure of the solution 70 degree C? A. ethanol = ? Which has the highest vapor pressure quizlet? {/eq}, moles of ethanol = {eq}\rm \frac{45.5~g}{46.07~g/mol} = 0.987~mol The vapor pressure of ethanol is 45 torr, and the vapor pressure of methanol is 92 torr. Suppose a solution is prepared by mixing 138 g of benzene and 91.2 g of heptane. [Pg.225] 194 C 3. The vapor pressure of methanol is 92 torr when pure at that temperature. i. {/eq}, {eq}\rm \chi_{CH_3OH} = \frac{1.413~mol}{1.413~mol + 0.987~mol} Round each of your answers to 3 significant digits. The vapor pressure of pure water at 50.0 degrees Celsius is 90.0 mmHg. What is the mole fraction o. 2.87 C. 3.87 D. 4.87 E. 5.87, The vapor pressure of pure benzene, C_6H_6 at 20^o C is 75mm Hg while the vapor pressure of toluene, C_7H_8 at this temperature is 22 mm Hg. Methanol has the higher vapor pressure because its molecules are smaller than those of ethanol, and so its intermolecular forces are less than ethanols. Calculate the geometric mean return for the following data set: What is partial pressure? Calculate the value of DeltaH vap for this liquid in kJ/mol. 201.0 Round each of your answers to 3 significant digits. At 34.18 ^oC, the vapor pressure of water is 40.1 torr. What is its heat of vaporization? These cookies will be stored in your browser only with your consent. 45.5 g (b) Ethanol and methanol form a solution that behaves like an ideal . What characteristics allow plants to survive in the desert? Vapor pressure is the pressure exerted by the vapor molecules of a substance in a closed system. x_{C_2H_5OH} = 0.33 Assume ideal behavior and calculate the partial pressures (in mmHg) of ethanol and 1-propanol at 35 ^oC over a solution of ethanol in 1, 1. Answer in units of torr. Give the answer to three decimal places. Correct answers: 3 question: A solution of methanol and water has a mole fraction of water of 0.312 and a total vapor pressure of 211 torr at 39.9 C. Consider gaseous water at 300 K at a pressure of 10.0 Torr. Suppose a solution is prepared by mixing 138 g of benzene and 91.2 g of heptane. What is the vapor pressure of the solution prepared by dissolving 0.500 mol of biphenyl, C_12H_10 in 4.50 mol C_6H_6? A certain liquid has a vapor pressure of 92.0 Torr at 23.0 C and 376.0 Torr at 45.0 C. Calculate the value of ?H vap for this liquid. This website uses cookies to improve your experience while you navigate through the website. 100 torr c. 47.6 to. The vapor pressure of dry ice (solid CO_2) is 672.2 torr at -80 degree C and 1486 torr at -70 degree C. (a) Calculate the molar heat of sublimation of CO_2. The lower flammability limit of methanol in air is 6 mole %. around the world. If carbon dioxide has a partial pressure of 295 mmHg and water vapor has a partial pressure of 137 mmHg, calculate the partial pressure of methane. Vapor pressure is a liquid property related to evaporation. 2. Calculate the partial pressure of He in the mixture (in atm). The vapor pressure of the resulting solution is \\ a) 123 torr b) 94.2 torr c) 65.8 torr d) 61.3 torr e) none. Plot a vapor pressure curve for C2H4F2 from the following vapor pressures. Determine the boiling point of C2H4F2 under a pressure of 200 torr. What mass of propanone must be mixed with 3, A sample of O_2 gas was collected over water at 23 degree C and 711 torr. At equilibrium, the partial pressures of the gases are PCO = 0.295 atm, PH2 = 1.25 atm, and PCHOH. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. A substance has a heat of vaporization of 16.69 kJ/mol. At 30 ^oC, vapor pressure was 250.0 mmHg. An ideal solution is formed at the same temperature by mixing 60 g of ethanol with 40 g of methanol. CH3OH(l) Can any one help me step-by-step with this? The compound with the weakest intermolecular forces will have the highest vapor pressure. 1. At 28.0 degrees Celsius, the vapor pressure of pure carbon disulfide, CS2, is 378.7 torr, while that of acetone, C3H6O, is 228.9 torr. [Pg.284] Reported vapor pressures of methanol at various temperatures and the coefficients for the vapor pressure equations. Calculate the total vapor pressure above a solution of 45.3 g of methanol and 45.5 g of ethanol. P tot = P a + P b The partial pressures, P a and P b, are determined using Raoult's Law. a) What are the partial pressures of H2 and water vapor if the total pressure is 746 mm Hg? Calculate the ideal partial pressure of water at this temperature for a mixture of 45.0 g H_2O and 55.0 g CH_3OH? The vapor pressure of water at 25 deg C is 23.8 mmHg. What is the mole fraction of pentane in a pentane-hexane solution that has a vapor pressure of 302 torr at 25 degrees Celsius? \\ What is the mole fraction of methanol in this solution? The vapor pressure of water at 45.0 degrees Celsius is 71.93 torr. What is the vapor pressure of a mixture of 0.132 moles of ethanol with 0.281 moles of methanol? Methanol has the higher vapor pressure because its molecules are smaller than those of ethanol, and so its intermolecular forces are less than ethanols. CH3OH(g) The vapor pressure if ethanol (C2H5OH) is 672 torr at Assuming ideal behavior, what is the vapor pressure of a solution that contains twice as m, Equal moles of pure liquid benzene (vapor pressure of 94.2 torr) and pure liquid toluene (vapor pressure of 28.4 torr) are mixed together. What is the vapor pressure at 20.0C of a solution prepared by mixing 31.0 g methanol and 59.0 g ethanol? Octane, one of the major components in gasoline, has a vapor pressure of 12.90 torr at 25 degrees Celsius and a vapor pressure of 144.9 torr at 75 degrees Celsius. (b) Ethanol and methanol form a solution that behaves like an ideal solution. The ΔHvap of water is 40.7 kJ/mol. The vapor pressure of benzene, C_6H_6, at 61 degrees C is 400 torr. \\ What is the vapor pressure of a mixture of 0.132 moles of ethanol with 0.281 moles of methanol? Assume ideal behavior and calculate the partial pressures (in mmHg) of ethanol and 1-propanol at 35 ^oC over a solution of ethanol in 1. Calculate the value of Delta Hvap for this liquid. National Center for Biotechnology Information. What is the vapor pressure of a 6.6% by mass aq ethylene glycol (HOC2H4OH) solution at 0oC? Calculate the total vapor pressure of a solution made by mixing behaviour what is the vapour pressure (in torr) at 20 C of a The vapor pressure of pure bromine at 300 K is 30.5 kPa, and the vapor pressure of CCl4 is 16.5 kPa. So, for example, methanol has a vapor pressure of 94 torr at 25 C, and ethanol has a vapor pressure of 44 torr at 25 C. Cookies are only used in the browser to improve user experience. Estimate the heat of vaporization of water if the vapor pressure is 17.54 torr at 20^(o) C and 149.4 torr at 60^(o) C. At 35C water has a vapor pressure of 42.2 torr. Find it in C. The vapor pressure of the liquid NH_3 is measured at different temperatures. 260 C 009 1.0points At 75 , the vapor pressure of water, methanol, diethylether and benzene are 289, 1126, 2680, and 644 torr, respectively. As the pressure is reduced from 450 torr, the first vapor (first bubble) is observ. torr. {/eq}, Vapor pressure of Ethanol = {eq}\rm P^o_{C_2H_5OH} = 222\ torr atm CH_3OH, is 100. mm Hg at 294 K. A 9.97E-2 g sample of liquid CH_3OH is placed in a closed, evacuated 460. mL container at a temperature of 294 K. The molecular m. Calculate the PdryH2 at 21.5 degrees Celsius if the H2 gas is collected over water at 21.5 degrees Celsius and room pressure is 745 torr.
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