（1）向1L1mol/L的NaOH溶液中加入下列物质：①浓H₂SO₄；②稀硝酸；③稀醋酸，恰好完全反应的热效应为△H₁、△H₂、△H₃，则三者由小到大顺序为____ 

（2）由盖斯定律结合下述反应方程式，回答问题：

①NH₃（g）+HCl（g）═NH₄Cl（s）△H=﹣176kJ/mol

②NH₃（g）+H₂O（l）═NH₃•H₂O（aq）△H=﹣35.1kJ/mol

③HCl（g）+H₂O（l）═HCl（aq）△H=﹣72.3kJ/mol

④NH₃•H₂O（aq）+HCl（aq）═NH₄Cl（aq）△H=﹣52.3kJ/mol

则NH₄Cl（s）+2H₂O（l）═NH₄Cl（aq）其△H等于____  kJ/mol．

（3）根据下列热化学方程式分析，写出C（s）燃烧热的热化学方程式____ 

C（s）+H₂O（l）═CO（g）+H₂（g）△H₁=+175.3kJ•mol^﹣1

2CO（g）+O₂（g）═2CO₂（g）△H₂=﹣566.0kJ•mol^﹣1

2H₂（g）+O₂（g）═2H₂O（l）△H₃=﹣571.6kJ•mol^﹣1．

用括号内所给词的适当形式填空（每空不限一词）。

①The ____ (thirty-one) Olympics will be held in Brazil（巴西）in 2016.

②It was____  (care) of Jim to leave the tap running all night.

③— Which do you think is ____  (valuable), time or money?

— Time, I think. When time is gone, it never comes back.

④Usually, books for children ____ (write) in simple languages.

⑤— Could you tell me how ____ (succeed) in making a speech in front of people?

— Be confident. That's the point.