The Enthalpy and Entropy of Vaporization of Ammonia at Its $\circ$

question 147

Multiple Choice

The enthalpy and entropy of vaporization of ammonia at its normal boiling point,-33.34 ^$\circ$ C,are 23.35 kJ/mol and 97.4 J/mol . K,respectively.What is the entropy change of the universe when one mole of liquid ammonia vaporizes in a large room maintained at 34.0 ^$\circ$ C? Assume the final temperature of the ammonia gas is -33.34 ^$\circ$ C.

• A)+21.4 J/K
• B)-76.0 J/K
• C)+74.1 J/K
• D)-21.4 J/K
• E)+76.0 J/K

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