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28 solutions

Clausius-Clapeyron Equation

Q. A sealed glass jar has a small amount of water on the bottom. The rest of the volume in the jar is taken up by helium gas at a partial pressure of 526 mmHg, and water vapor. If the total pressure inside the jar is 760. mmHg, what is the temperature of the water? Express the temperature numerically in degrees Celcius.

Solved • Oct 28, 2019

Clausius-Clapeyron Equation

Q. You are in a mountain range with atmospheric air pressure of 520 mmHg, and you wish to boil some eggs. What is the approximate boiling point of the water at this air pressure? Express the temperature in degrees Celsius using two significant figures.

Solved • Oct 28, 2019

Clausius-Clapeyron Equation

Q. 7. For the vaporization of ethanol (CH3CH2OH) at 25oC CH3CH2OH(l) → CH3CH2OH(g) ∆Hof(kJ mol-1)-277.63-235.1∆Gof(kJ mol-1)-174.8-168.6 c) What is the vapor pressure at 400 K?

Solved • Sep 20, 2019

Clausius-Clapeyron Equation

Q. 15. The enthalpy of vaporization for a substance is 14.2 kJ mol^-1. The vapor pressure was found to be 88.5 mmHg at 201.2 K.What is the vapor pressure (in mmHg) at 301.2 K?

Solved • Sep 20, 2019

Clausius-Clapeyron Equation

Q. 14. A substance is found to have a vapor pressure of 79.3 mmHg at 312 K and a vapor pressure of 145 mmHg at 357.2 K. What is the enthalpy of vaporization (in kJ mol^1 to one decimal place) for this substance?

Solved • Sep 20, 2019

Clausius-Clapeyron Equation

Q. 4. The following plot shows the vapor pressures of ethanol at varying temperature. Estimate ΔHvap (in kJ mol^-1 to two decimal places) for ethanol.

Solved • Sep 20, 2019

Clausius-Clapeyron Equation

Q. Ethanol has a heat vaporization of 38.56 jK/mol and a normal boiling point of 78.4 degrees C. What is the vapor pressure of ethanol at 19 degrees C? Express your answer using two significant figures.

Solved • Sep 17, 2019