
Interpretation:
The vapor pressure of methanol at
Concept introduction:
The relationship between vapor pressure and temperature is given by the Clausius–Clapeyron equation, expressed as:
Here,
Conversion factor forkilo joule per mole to joule per mole:

Answer to Problem 141AP
Solution:
Explanation of Solution
To convert temperature from degree Celsius to kelvin, the expression is as follows:
Here,
Convert the temperature intokelvin:
The reaction is as follows:
The molar enthalpy of vaporization is as follows:
Convert the heat in joule per mole as follows:
The relation between pressure and temperature is as follows:
Substitute the values of pressure, temperatures, and enthalpy of vaporization,
Usingantilogarithm on both sides as follows:
Rearrange the above expression to discern the value of pressure.
The vapor pressure of methanol at
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Chapter 11 Solutions
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