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能量的相互转化

> 下列叙述中正确的是( ) A．在一个确定的化学反应关系中，反应物的总能量与生成物的总能量可能相同 B．在101kPa时，1mol物质燃烧时的反应热叫做该物质的标准燃烧热 C．热化学方程式中，各物质前的化学计量数不表示分子个数 D．如果反应物所具有的总能量小于生成物所具有的总能量,则该反应是放热反应

问题：

发布时间：2024-09-08

下列叙述中正确的是( )

A．在一个确定的化学反应关系中，反应物的总能量与生成物的总能量可能相同

B．在101kPa时，1mol物质燃烧时的反应热叫做该物质的标准燃烧热

C．热化学方程式中，各物质前的化学计量数不表示分子个数

D．如果反应物所具有的总能量小于生成物所具有的总能量,则该反应是放热反应

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