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Chemistry Thermodynamics and Thermochemistry General Single Correct MCQ
Published on: August 14, 2026

Animals operate under conditions of constant pressure and most of the process that maintain life are isothermal (in a broad sense). How much energy is available for sustaining this type of muscular and nervous activity from the combustion of 1 mol of glucose molecules under standard conditions at 37ºC (blood temperature) ? The entropy change is + 182. 4 JK –1 for the reaction stated above.

Δ H combustion [glucose] = –2808 KJ

Δ H ngu = –2808 KJ

A
– 2754.4 KJ
B
– 2864.5 KJ
C
– 56.5 KJ
D
– 2808 KJ

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The correct answer is:
B

Δ G = Δ H – T Δ S = – 2808 – 310 × 182.4 × 10 –3 = – 2864.5 kJ

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