Question

Which relationship or statement best describes Delta Sfor the following reaction?

Answer 1

Answer: $\Delta S$< 0

Explanation:

Entropy is the measure of randomness or disorder of a system. If a system moves from  an ordered arrangement to a disordered arrangement, the entropy is said to decrease and vice versa.

For the reaction $CaO(s)+CO_2(g)\rightarrow CaCO_3(s)$

In this reaction gaseous reactants are converting to solid products. The randomness will decrease and hence entropy will also decrease. Thus $\Delta S$ is negative or less than zero.