题目

某化学反应其△H=﹣198kJ•mol﹣1，△S=348J•mol﹣1•K﹣1，则此反应在下列哪种情况下可自发进行（ ）A.仅在低温下自发进行 B.仅在高温下自发进行C.在任何温度下都不能自发进行 D.在任何温度下都能自发进行 答案：【答案】D【解析】根据复合判据ΔG=ΔH-TΔS进行分析。△H=﹣198kJ•mol﹣1<0，△S=348J•mol﹣1•K﹣1>0，因此ΔG=ΔH-TΔS始终为负值，即ΔG<0，在任何条件下均可自发进行；答案选D。 1.We’re staying there for two days.(划线提问)   _______   _________ are you staying there? 2.I think he goes to school by subway. (改为否定句)    I___________ think he _____ to school by subway [来源:Z&xx&k.Com] 3.You gave me much help. Thank you . ( 合并句子) Thank you        _____           me. 4.This pen is cheaper than the other two.(同义句转换) This pen is ____________ ____________ of the three. 5.Let’s clean our bedroom, __________   __________________?