6824. A rigid vessel containing three moles of nitrogen gas at 30°C is heated to 250°C. Assume the average capacities of nitrogen to be Cp = 29.1 J/mole.°C and, Cv = 20.8 J/mole.°C. The heat required, neglecting the heat capacity of the vessel, is September 7, 2025 by Admin 13728 J 19206 J 4576 J 12712 J ✅ The correct answer is option B.