Which of the following conditions will result in a reaction that is spontaneous at all temperatures?
a. positive enthalpy change and positive entropy change
b. negative enthalpy change and positive entropy change
c. positive enthalpy change and negative entropy change
d. negative enthalpy change and negative entropy change
d. liquid water is less dense than solid water
The answer is b. negative enthalpy change and positive entropy change. The reaction will always spontaneous to the heat decrease and entropy increase direction.
