7. A gas sample is heated in a cylinder, using 375KJ of heat. At the same time a piston compresses t
問題詳情
7. A gas sample is heated in a cylinder, using 375KJ of heat. At the same time a piston compresses the gas, using 645KJ of work. What is the change in internal energy of the gas during this process? (A)1020KJ (B)270KJ (C)1.72KJ (D)500KJ (E)30KJ