下列说法中正确的是( )
A.在100 ℃、101 kPa条件下,1 mol液态水汽化时需要吸收40.69 kJ的热量,则H2O(g) ===H2O(l)的ΔH=+40.69 kJ·mol-1 |
B.已知CH4(g)+2O2(g)===CO2(g)+2H2O(l) ΔH=-890.3 kJ·mol-1,则CH4的燃烧热ΔH=-890.3 kJ |
C.H2(g)+Br2(g)==="2HBr(g)" ΔH=-72 kJ·mol-1其他相关数据如下表: 则表中a为230 |
D.已知S(g)+O2(g)===SO2(s)ΔH1,S(g)+O2(g)===SO2(g)ΔH2,则ΔH2<ΔH1 |