详细解释:【机】 物态变化
英语解释：
名词 change of state:
the act of changing something into something different in essential characteristics例句：
Measurement of the amount of heat evolved or absorbed in a chemical reaction, change of state, or formation of a solution.反应热测量对某一化学反应过程、状态变化过程或一溶解过程释放也或吸收的热量所作的测量