A 1.0 mol sample of benzene is maintained at 1 atm

CHEMISTRY · Single correct · A Level · Chemistry · Energetics · Energetics

Problem

A 1.0 mol sample of benzene is maintained at 1 atm. Which of the following changes will result in a positive value of qq for the benzene system? (a) C6H6(g)→C6H6(l)\text{C}_6\text{H}_6(g) \rightarrow \text{C}_6\text{H}_6(l) at 80 ∘C80\,^{\circ}\text{C} (b) C6H6(s)→C6H6(l)\text{C}_6\text{H}_6(s) \rightarrow \text{C}_6\text{H}_6(l) at 5 ∘C5\,^{\circ}\text{C} (c) C6H6(g)→C6H6(s)\text{C}_6\text{H}_6(g) \rightarrow \text{C}_6\text{H}_6(s) at −20 ∘C-20\,^{\circ}\text{C} (d) C6H6(l,80 ∘C)→C6H6(l,60 ∘C)\text{C}_6\text{H}_6(l, 80\,^{\circ}\text{C}) \rightarrow \text{C}_6\text{H}_6(l, 60\,^{\circ}\text{C})

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