Question

which of the following reaction is exothermic?
A) H2c (g) ----2 H (g)
B) C(s) ----C(g)
C) 2cl(g)----cl2(g)
D)H2O(s)----H2O(l)​

Answer 1

Explanation:

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Answer 2

Answer:

ANSWER

2Cl(g)→Cl

2

(g)

Entropy is decreasing (−ve) in the reaction as no. of molecules are decreasing which reduces the randomness of the system. Further the reaction is exothermic since a bond is being formed, i.e., △H is also −ve.

Hence, option C is correct