理想气体的焓变和热力学能变之差为<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/pzst/question_bank/res/3b/c7/3bc757aa82b35c802385b927722d3b6f5b915f64.jpg?x-oss-process=image/sharpen,200,http://p.ananas.chaoxing.com/star3/origin/b21bb9d8efecb39fb5228151e1fd51b5.png"/> <br/> 正确 <br/> 错误