At constant volume, 4 mol of an ideal gas when heated from 300 K to 500 K changes its internal energ — Thermodynamics and Thermochemistry Chemistry Question

Question

At constant volume, 4 mol of an ideal gas when heated from 300 K to 500 K changes its internal energy by 5000 J. The molar heat capacity at constant volume is(in JK mol ) _____. . -1 -1