Question 28
Energy ChangesWhich of the following hydrogen halides has the highest entropy value?
- A.HF
- B.HCl
- C.HBr
- D.HI
Show the answer and explanation
Answer: D (HI)
Explanation
Standard entropy rises with molar mass and number of electrons down the group (HF ≈ 174, HI ≈ 207 J K-1 mol-1), so HI has the highest.