The Vapor Pressure of Ethanol Is 400

question 115

Multiple Choice

The vapor pressure of ethanol is 400. mmHg at 63.5°C. Its molar heat of vaporization is 39.3 kJ/mol. What is the vapor pressure of ethanol, in mmHg, at 34.9°C? (R = 8.314 J/K • mol)

• A) 109 mmHg
• B) 220 mmHg
• C) 366 mmHg
• D) 376 mmHg
• E) 1470 mmHg

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