Question Detail

CHM 101 CHM 101 Past Questions Objective Question
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Question

For the combustion of iron: 4 Fe(s) + 3 O2(g) -> 2 Fe2O3(s) (Delta H = -826 kJ/mol), what primarily drives spontaneity?
Options
A An increase in system entropy as gas is converted to solid
B The large release of heat that increases the entropy of the surroundings
Correct Answer
C The conversion of an element into a pure compound
D A decrease in the total number of microstates in the surroundings
Correct Answer

Option B is the correct answer.

Detailed Explanation

Although Delta S_sys is negative due to loss of gas molecules, the large negative Delta H_sys creates a substantial positive Delta S_surr, driving spontaneity.

Hint

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Question Info

Course: CHM 101
Topic: CHM 101 Past Questions
Type: Objective
Difficulty: Not specified
Question 1844 of 1872
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