Which 1-mole sample has the least entropy?
(1) br2(s) at 266 k (3) br2(l) at 332 k
(2) br2(l) at 266 k (4) br2(g) at 332 k

The correct answer is option 1. Entropy is the degree of disorderliness in a system. Among the phases, solid has the most ordered structure. Also, at lower temperatures the molecules will have less kinetic energy therefore less motion. Thus, bromine in solid form at 266K has the least entropy.

Option AThe answer is  

Explanation:

Given :

6 moles of a compound on reaction produces or gives Δ is the energy produced during the reactionThis is also equal to the energy released when the compound reacts ( breakdowns and turns into a new one )Thus the Δ per mole :

                 Δ

The answer is which is A