单项选择题
Which processes is endothermic?
A、C(s) + O2(g)=CO2(g)
B、2H2(g) + O2(g)=2H2O(l)
C、2NH3(g)=3H2(g) + N2(g)
D、2C(s) + O2(g)=2CO(g)
点击查看答案&解析
相关考题
