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What is the δh o vap of a liquid that has a vapor pressure of 623 torr at 77.3°c and a boiling point of 97.5°c at 1 atm?

User Slackmart
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Final answer:

The question requires using the Clausius-Clapeyron equation to calculate the standard enthalpy of vaporization (ΔH°vap) from the given vapor pressure and the boiling point of a liquid.

Step-by-step explanation:

The student is asking for the standard enthalpy of vaporization (ΔH°vap) of a liquid with a given vapor pressure at a specific temperature and its boiling point at standard atmospheric pressure. To determine this, we would typically use the Clausius-Clapeyron equation, which relates the change in vapor pressure with temperature to the enthalpy of vaporization. This calculation involves the vapor pressure at a known temperature, the boiling point temperature, and the gas constant (R).

However, to provide an exact answer to the student's question, it is necessary to use the known values in conjunction with the Clausius-Clapeyron equation and perform some calculations that involve logarithms and the change in temperature. The example provided about the boiling point of water and the vapor pressure-temperature relationship for another substance serves as a reference to the type of calculation that should be performed here.

User Aswath Krishnan
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