听力原文:M: I bought this color TV set here yesterday, but it doesn't work. W: Did you try it before you took it home? M: You didn't allow me, did you? Where does the conversation most likely take place?
【简答题】(1)合成氨工业中氢气可由天然气和水反应制备,其主要反应为: CH 4 (g)+ 2H 2 O (g) CO 2 (g)+4H 2 (g) 反应过程中能量变化如图所示, 则该反应为 反应(填“吸热”或“放热”) 若已知,破坏1mol化学键需要吸收的热量如下表所示: 化学键 C—H O—H C=O H—H 吸收热量(kJ/mol) a b c d 则该反应吸收或放出热量为 kJ(用含a b c...