七年级2021-2022英语周报13期答案

28.(1)-49A△H1为正值,△H2和△H为负值,反应①活化能大于反应②的(2)①HO) P(CH,OH)P(H,). P(CO,②b总反应△H<0,升高温度时平衡向逆反应方向移动,甲醇的物质的量分数变小③33.3%5×103Pa,210℃9×103Pa,250℃

Passage s1. preferred 2. However 3 which 4. With 5. traditional6 is 7. before 8 were discovered 9. safety 10to tell

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