Question Detail

CHM 101 Chemical Thermodynamics Objective Question
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Question

Between 1 mol NH₃(g) and 1 mol He(g) at 25°C, which has higher entropy and why?
Options
A He(g) has higher entropy because it is monatomic
B NH₃(g) has higher entropy because it is a polyatomic molecule with translational, rotational, and vibrational motions, leading to more microstates
Correct Answer
C Both have equal entropy because they are gases
D He(g) has higher entropy because it is lighter
Correct Answer

Option B is the correct answer.

Detailed Explanation

NH₃(g) has higher entropy. Even though He is lighter, NH₃ is a polyatomic molecule with translational + rotational + vibrational motions, which greatly increases the number of microstates and therefore entropy.

Hint

The notes provide this comparison.

Question Info

Course: CHM 101
Topic: Chemical Thermodynamics
Type: Objective
Difficulty: Not specified
Question 968 of 1872
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