试题 试卷
题型:单选题 题类:常考题 难易度:普通
2015-2016学年江西省井冈山大学附中高一下学期期末化学试卷
C(s)+H2O(g)═CO(g)+H2(g)△H=bkJ•mol﹣1
H﹣H,O﹣H和O=O键的键能分别为436、462和495kJ•mol﹣1 , 则b为( )
① CH4(g) = C(s)+2H2(g) △H1 = + 75.0 kJ·mol-1
② CO2(g)+H2(g) = CO(g)+H2O(g) △H2 = + 41.0 kJ·mol-1
③ CO(g)+H2(g) = C(s)+H2O(g) △H3 = -131.0 kJ·mol-1
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