The correct order of molar heat capacities measured at 298 K and 1 bar is :
← JEE Main 2026 · 5 Apr · Shift 2
ChemistrySingle correct+4 / -1Question 55 of 75
JEE Main 2026 · 5 Apr · Shift 2, Chemistry question 55
Answer and worked solution
Official answer: B
Molar heat capacities at 298 K (J mol K):
- Liquid bromine: about 76. A diatomic liquid has many modes of motion.
- Copper: about 24, close to Dulong-Petit's 3R.
- Helium: at constant pressure, translation only.
Order: Bromine(l) > Copper(s) > Helium(g).
(B)
Topics:Calorimetry