Helium has a molar specific heat at constant volume of 12.5 J mol⁻¹ K⁻¹ and a molar mass of 4.0 g/mol. What is its specific heat at constant volume per kilogram?

1. A Option A: 3.1 × 10³ J kg⁻¹ K⁻¹
2. B Option B: 3.2 × 10⁻⁴ J kg⁻¹ K⁻¹
3. C Option C: 50 J kg⁻¹ K⁻¹
4. D Option D: 3.1 J kg⁻¹ K⁻¹

Answer checked 11 October 2026 · How we write and check questions