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20. 要使一个化学反应系统在发生反应后焓值不变, 必须满足的条件是

A、温度和内能都不变

B、内能和体积都不变

C、孤立系统

D、内能, 压力与体积的乘积都不变

时间：2021-09-01 16:55 关键词：青书学堂平顶山学院医学检验技术物理化学

答案解析

D

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