A. 只有恒压过程才有焓变 B. 只有等温等压且不做非体积功W'的过程的反应热才等于焓变 C. 任何过程都有焓变,且焓变等于反应热 D. 任意单质的焓变和自由能变都等于零
A. 对 B. 错
A. is spoken B. was spoken C. speaks D. is speaking
A. is found B. finds C. was found D. found