1.
(2017高一下·湖州期中)
1g CH4完全燃烧生成CO2和液态水时放出55.6kJ的热量,该反应的热化学方程式为( )
A . CH4(g)+2O2(g)═CO2(g)+2H2O(l)△H=﹣55.6 kJ•mol﹣1
B . CH4(g)+2O2(g)═CO2(g)+2H2O(g)△H=﹣55.6 kJ•mol﹣1
C . CH4(g)+2O2(g)═CO2(g)+2H2O(l)△H=﹣889.6 kJ•mol﹣1
D . CH4(g)+2O2(g)═CO2(g)+2H2O(g)△H=﹣889.6kJ•mol﹣1