Ethanol Has an Enthalpy of Vaporization of 42

question 21

Multiple Choice

Ethanol has an enthalpy of vaporization of 42.3 kJ/mol.The compound has a vapor pressure of 1.00 atm at 78.3 °C.At what temperature is the vapor pressure equal to 0.800 atm? (R = 8.314 J/K ⋅ mol)

• A) -83.8 °C
• B) -24.4 °C
• C) 62.6 °C
• D) 73.0 °C
• E) 78.0 °C

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Definitions:

Perceived Behavioral Control

An individual's belief in their capability to exert control over their own behavior.

Transtheoretical Model

A theory of behavioral change that describes five stages individuals go through to change their behavior: precontemplation, contemplation, preparation, action, and maintenance.

Maintenance

The ongoing care or upkeep of systems, equipment, or property to ensure continued functioning and prevention of degradation or failure.

Precontemplation

The stage in which individuals are not yet considering a change in their behavior or are unaware of the need for change.