下列说法正确的是
A.任何酸与碱发生中和反应生成1 mol H2O的过程中,能量变化均相同 |
B.甲烷燃烧热的热化学方程式CH4(g) + 2O2(g) ="=" CO2(g) +2H2O(g)ΔH= -Q kJ·mol-1 |
C.已知:①2H2(g)+O2(g)===2H2O(g)ΔH=-a kJ·mol-1, ②2H2(g)+O2(g)===2H2O(l)ΔH=-b kJ·mol-1,则a>b |
D.已知:①C(s,石墨)+O2(g)===CO2(g)ΔH=-393.5 kJ·mol-1, |
②C(s,金刚石)+O2(g)===CO2(g) ΔH=-395.0 kJ·mol-1,
则C(s,石墨)===C(s,金刚石) ΔH=+1.5 kJ·mol-1