JEE PYQ: Thermodynamics Question 33
Question 33 - 2019 (10 Jan Shift 2)
The process with negative entropy change is:
(1) Dissociation of $\text{CaSO}_3(s)$ to $\text{CaO}(s)$ and $\text{SO}_3(g)$
(2) Sublimation of dry ice
(3) Dissolution of iodine in water
(4) Synthesis of ammonia from $\text{N}_2$ and $\text{H}_2$
Show Answer
Answer: (4)
Solution
In the process of synthesis of ammonia from $\text{N}_2$ and $\text{H}_2$, number of moles decreases which implies that the change in entropy will be negative. $\text{N}_2(g) + 3\text{H}_2(g) \rightleftharpoons 2\text{NH}_3(g)$.
BETA
