一、判断气体的变化过程例1(2005年高考理综全国卷Ⅱ)对于定量气体,可能发生的过程是()(A)等压压缩,温度降低(B)等温吸热,体积不变(C)放出热量.內能增加(D)绝热压缩.内能不变解析:对于定量气体,等压压缩,外界对气体做功,根据热力学第一定律,如果放出的热大于做功的值,气体内能就会减少,气体温度就可 I. Judging the process of gas evolution Example 1 (2005 National Institute of Physical Education and Physical Education II) For quantitative gases, the possible processes are () (A) Isobaric compression, Temperature decrease (B) Isothermal endothermic, Volume is constant ( C) heat release. Internal energy increase (D) adiabatic compression. Internal energy invariant analysis: For quantitative gas, isobaric compression, external gas work, according to the first law of thermodynamics, if the heat released is greater than the value of work done, the gas Can be reduced, the gas temperature can be