試題詳解

5. A sample of 770 mol of nitrogen gas is maintained at a constant pressure of 1.00 atm in a flexible container. The gas is heated from 40^o C to 180^o C. What is the change in internal energy?（ Cp=6.95 cal/mol·C^o , R=8.315 J/mol·K）
(A) 3.32×10⁴J
(B) 2.24×10⁶J
(C) 6.22×10⁶J
(D) 7.12×10⁷J
(E) 8.82×10⁷J