“热力学第一定律”是整个选修3-3模块的重点,也是高考考查的热点,应给予足够的重视。纵观最近几年全国各地的高考物理试题,可以发现高考对这部分内容的考查集中在3个方面,现结合2011高考真题,分析如下。考查方式一:热力学第一定律与分子动理论相结合例1(.2011高考重庆第15题)某汽车后备箱内安装有撑起箱盖的装置,它主要由气缸和活塞组成。开箱时,密闭于气缸内的压缩气体膨胀,将箱盖顶起,如图所示。在此过程中,若缸内气体与 “The first law of thermodynamics ” is the focus of the entire elective 3-3 module, but also hot spots for college entrance examination, should be given sufficient attention. Throughout the recent years, college entrance examination physical exams across the country, you can find the entrance examination of this part of the content focused on three aspects, are now combined with the 2011 Zhenti Zhenti, analysis is as follows. A test method: the first law of thermodynamics and molecular dynamics theory combined Example 1 (.2011 college entrance examination 15 questions Chongqing) a car trunk mounted prop supporting device, which is mainly composed of a cylinder and piston. When unpacking, the compressed gas sealed in the cylinder is expanded and the lid is lifted, as shown in the figure. In this process, if the cylinder gas and