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1.2 One mole of ethanol, CH3CH2OH, is placed in a 250 mL beaker. Another mole of ethanol is placed in a 1.0 L beaker. Both beakers are covered and maintained at the same temperature. The equilibrium partial pressure of ethanol in the gas phase in the 250 mL beaker is 88 mm Hg. What is the equilibrium partial pressure, in millimeters of mercury, in the 1.0 L beaker? ) 22 b) 44 c) 88 d) 176 e) 352

1.2 One mole of ethanol, CH3CH2OH, is placed in a 250 mL beaker. Another mole of ethanol is placed in a 1.0 L beaker. Both beakers are covered and maintained at the same temperature. The equilibrium partial pressure of ethanol in the gas phase in the 250 mL beaker is 88 mm Hg. What is the equilibrium partial pressure, in millimeters of mercury, in the 1.0 L beaker? ) 22 b) 44 c) 88 d) 176 e) 352

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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1.2 One mole of ethanol, CH3CH2OH, is placed in a 250 mL beaker. Another mole of ethanol is placed in a 1.0 L beaker. Both beakers are covered and maintained at the same temperature. The equilibrium partial pressure of ethanol in the gas phase in the 250 mL beaker is 88 mm Hg. What is the equilibrium partial pressure, in millimeters of mercury, in the 1.0 L beaker? a) 22 b) 44 c) 88 d) 176 e) 352 1.3 Pentane (C5H12) and hexane (C,H14) form an ideal solution. The vapor pressures of pentane and hexane at 25 °C are 511 torr and 150 torr, respectively. If the mole fraction of hexane in a pentane-hexane solution is 0.50, what is the mole fraction of pentane in the vapor that is in equilibrium at 25 °C with this solution. a) 0.23 b) 0.77 c) 0.89 d) 0.50 e) none of these 1.4 The solubility of the salt MAy is 1.0 x 10-2 mol/L at 25°C. The osmotic pressure exhibited by a solution saturated with MrAy at 25°C is 1.22 atm. Determine the values of x and y by assuming ideal behavior. a) x= 1, y =3 b) x = 2, y = 5 c) x = 1, y = 1 d) x = 2, y = 3 e) none of these 1.5 A 50.00 g sample of a compound dissolved in 0.500 kg of chloroform (which boils at 61.2 °C and has K= 3.63 °C kg/mole) is found to elevate the boiling point of the solution by 2.50 °C. What is the molecular mass of the solute? (assume i=1) a) 70.6 g/mole b) 145 g/mole c) 145.2 g/mole d) 245 g/mole e) none of these
Transcribed Image Text:1.2 One mole of ethanol, CH3CH2OH, is placed in a 250 mL beaker. Another mole of ethanol is placed in a 1.0 L beaker. Both beakers are covered and maintained at the same temperature. The equilibrium partial pressure of ethanol in the gas phase in the 250 mL beaker is 88 mm Hg. What is the equilibrium partial pressure, in millimeters of mercury, in the 1.0 L beaker? a) 22 b) 44 c) 88 d) 176 e) 352 1.3 Pentane (C5H12) and hexane (C,H14) form an ideal solution. The vapor pressures of pentane and hexane at 25 °C are 511 torr and 150 torr, respectively. If the mole fraction of hexane in a pentane-hexane solution is 0.50, what is the mole fraction of pentane in the vapor that is in equilibrium at 25 °C with this solution. a) 0.23 b) 0.77 c) 0.89 d) 0.50 e) none of these 1.4 The solubility of the salt MAy is 1.0 x 10-2 mol/L at 25°C. The osmotic pressure exhibited by a solution saturated with MrAy at 25°C is 1.22 atm. Determine the values of x and y by assuming ideal behavior. a) x= 1, y =3 b) x = 2, y = 5 c) x = 1, y = 1 d) x = 2, y = 3 e) none of these 1.5 A 50.00 g sample of a compound dissolved in 0.500 kg of chloroform (which boils at 61.2 °C and has K= 3.63 °C kg/mole) is found to elevate the boiling point of the solution by 2.50 °C. What is the molecular mass of the solute? (assume i=1) a) 70.6 g/mole b) 145 g/mole c) 145.2 g/mole d) 245 g/mole e) none of these
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