为什么一定质量 0℃的冰熔化为相等质量 0℃的水 ,总的分子势能增加了呢 ?中学生运用所学的分子动理论初步知识来解释时 ,往往会得出总的分子势能减少的错误结论 .他们认为 :等质量 0℃的冰的体积比0℃水的体积大 ,冰熔化为水 ,分子间平均距离减小 ,分子力做功 ,所以总的分子势 Why does the mass of 0°C ice melt into water of equal mass 0°C, and the total molecular potential energy increases? When middle school students use the initial knowledge of the molecular dynamics theory to explain, they often come to the wrong conclusion that the total molecular potential decreases. They believe that the mass of ice at 0°C is greater than the volume of water at 0°C, ice melts into water, the average distance between molecules decreases, and the molecular force works, so the total molecular potential