【单选题】听力原文:W: Why is Bob so upset? M: He's been studying day and night for his final exam. I warned him many times to prepare earlier. Q: What does the man mean? (17)
【简答题】某理想气体的 C V, m = 3 R / 2 ,开始处于 0 °C, 100 kPa 和 100 dm 3 。 ( 1 ) 若恒容升温,使其压力变为 200 kPa ; ( 2 ) 若绝热可逆压缩,压力变为 200 kPa 。 分别求出上述两个过程的 Q , W , D U , D H 。