题目
题型:不详难度:来源:
A.2A(g)+B(g)=C(g)+3D(l)+4E(g);△H=+kJ/mol |
B.2A(g)+B(g)=C(l)+3D(g)+4E(g);△H=-kJ/mol |
C.2A(g)+B(g)=C(g)+3D(g)+4E(s);△H=-kJ/mol |
D.2A(g)+B(g)=C(g)+3D(l)+4E(g);△H=-kJ/mol |
已知下列热化学方程式: 2C(s)+O2(g)═2CO(g)△H=-221kJ/mol 2H2(g)+O2(g)═2H2O(g)△H=-483.6kJ/mol 由此可知C(s)+H2O(g)═CO(g)+H2(g)△H等于( ) |