• 2022-06-28
    已知 298 K 时,CH4(g),CO2(g),H2O(l)的标准摩尔生成焓分别为 -74.8 kJ·mol-1,-393.5 kJ·mol-1和-285.8 kJ·mol-1,则298 K时CH4(g)的标准摩尔燃烧焓为( )
    A: -990.3kJ·mol-1
    B: -890.3kJ·mol-1
    C: -790.3kJ·mol-1
    D: -690.3kJ·mol-1