The molar heat capacity for an ideal gas at constant pressure is 20.785 J K mol . The change in inte — Thermodynamics and Thermochemistry Chemistry Question

Question

The molar heat capacity for an ideal gas at constant pressure is 20.785 J K mol . The change in internal energy is 5000 J upon heating it from 300K to 500K. The number of moles of the gas at constant volume is ___ [Nearest integer] (Given: R = 8.314 J K mol ) –1 –1 –1 –1