Question

For which of the following reaction delta S is negative?
a) Mg(s) + Cl2 --> MgCl2
b) H2O(l) --> H2O(g)
c) CaCO3(s) --> CaO(s) + CO2(g)
d) I2(g) --> 2L(g)
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Answer 1

Answer:

option a

Explanation:

here no. of molecules on reactant side is more than products so entropy of product is low