题目

已知：CH4(g)+2O2(g)=CO2(g)+2H2O(1) △H = ― Q1 KJ/mol 2H2(g)+O2(g)=2H2O(g) △H = ―Q2 KJ/mol2H2(g)+O2(g)=2H2O(1) △H = ―Q3KJ/mol则0.4mol甲烷和0.1mol氢气的混合气体经完全燃烧后恢复至常温，则放出的热量为( )KJ。 A . 0.4Q1+0.05Q3 B . 0.4Q1+0.05Q2 C . 0.4Q1+0.1Q3 D . 0.4Q1+0.1Q2 答案：AThe meeting went on in such a friendly ____ that everything was settled ahead of schedule. A．scenery B．religion C．curiosity D．atmosphere