A) enthalpy change and entropy change, are both negative
B) enthalpy change and entropy change, are both positive
C) enthalpy change is negative and entropy change is positive
D) enthalpy change is positive and entropy change is negative
Correct Answer: D
Solution :
A reaction will not occur if enthalpy change for that reaction is positive \[(\Delta H>0)\] and entropy change is negative \[(\Delta S<0).\] As in this case, \[\Delta G\] will be definitely positive.
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