Let us consider an endothermic reaction which is non-spontaneous at the freezing point of water. However, the reaction is spontaneous at boiling point of water. Choose the correct option.

(a) Both a

Question

Let us consider an endothermic reaction which is non-spontaneous at the freezing point of water. However, the reaction is spontaneous at boiling point of water. Choose the correct option.

(a) Both  and  are 
(b)  is  but  is 
(c)  is  but  is 
(d) Both  and  are

Canvas Classes · Accepted Answer

Strategy:
 Analyze the temperature conditions for spontaneity based on .

Step 1: Evaluate signs
1. Endothermic: Given .
2. Transition: Non-spontaneous at low T () and spontaneous at high T ().
This behavior occurs when the  term is negative and grows in magnitude with . For  to be negative,  must be positive.
Result: Both  and  are positive.

More questions from Thermodynamics