MCAT General Chemistry Question 105: Answer and Explanation
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Question: 105
15. Explosions are necessarily characterized by:
- A. ΔG < 0.
- B. ΔH > 0.
- C. ΔS < 0.
- D. T < 0.
Correct Answer: A
Explanation:
In an explosion, a significant amount of heat energy is released, meaning that the reaction is exothermic (ΔH < 0), eliminating choice (B). The entropy change associated with an explosion is positive because energy is dispersed over a much larger area, eliminating choice (C). If this is true, the expression ΔH - TΔS must be negative, indicating that this is an exergonic process (ΔG < 0). Absolute temperature can never be negative, eliminating choice (D).