Under which conditions is a reaction spontaneous at all temperatures?
Answer and explanation
Correct answer: D. Enthalpy change negative and entropy change positive, so the free energy change is always negative
- Step 1: delta G = delta H - T delta S. Step 2. A negative delta H and a positive delta S make both terms push delta G negative for every T. Answer: negative enthalpy change and positive entropy change. Why not the others: positive H with positive S works only at high temperature, negative H with negative S only at low temperature, and positive H with negative S is never spontaneous.
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