1.
(2018高二上·安徽期中)
CH4-CO2催化重整反应为：CH4(g)+ CO2(g)=2CO(g)+2H2(g)。已知：①C(s)+2H2(g)=CH4(g) ΔH=-75 kJ·mol−1②C(s)+O2(g)=CO2(g) ΔH=-394 kJ·mol−1③C(s)+1/2O2(g)=CO(g) ΔH=-111 kJ·mol−1则该催化重整反应的ΔH等于（ ）
A . -580 kJ·mol−1
B . +247 kJ·mol−1
C . +208 kJ·mol−1
D . -430kJ·mol−1
