4.[2017江苏,8,2分]通过以下反应可获得新型能源二甲醚(CH3OCH3)。下列说法不正确的是()
①C(s)+H2O(g) CO(g)+H2(g)ΔH1=akJ·mol-1
②CO(g)+H2O(g) CO2(g)+H2(g)ΔH2=bkJ·mol-1
③CO2(g)+3H2(g) CH3OH(g)+H2O(g)ΔH3=ckJ·mol-1
④2CH3OH(g) CH3OCH3(g)+H2O(g)ΔH4=dkJ·mol-1
A.反应①、②为反应③提供原料气
B.反应③也是CO2资源化利用的方法之一
C.反应CH3OH(g) CH3OCH3(g)+H2O(l)的ΔH= kJ·mol-1
D.反应2CO(g)+4H2(g) CH3OCH3(g)+H2O(g)的ΔH=(2b+2c+d)
kJ·mol-1
