• 2022-11-02 问题

    某船从(40°N,140°E)航行到(42°N,160°E),则应驶的恒向线航程为() A: 925.5 n mile B: 913.6 n mile C: 908.5 n mile D: 903.1 n mile

    某船从(40°N,140°E)航行到(42°N,160°E),则应驶的恒向线航程为() A: 925.5 n mile B: 913.6 n mile C: 908.5 n mile D: 903.1 n mile

  • 2022-06-07 问题

    已知H2O(g) = H2(g) +0.5O2(g),ΔrHm(1) = 241.8 kJ·mol–1;H2(g) = 2H(g),ΔHm(2) = 436.0 kJ·mol–1;0.5O2(g) = O(g),ΔHm(3)=247.7 kJ·mol–1则H2O中H–O键的平均键焓(单位:kJ·mol–1)为() A: 462.8 B: 925.5 C: –462.8 D: 241.8

    已知H2O(g) = H2(g) +0.5O2(g),ΔrHm(1) = 241.8 kJ·mol–1;H2(g) = 2H(g),ΔHm(2) = 436.0 kJ·mol–1;0.5O2(g) = O(g),ΔHm(3)=247.7 kJ·mol–1则H2O中H–O键的平均键焓(单位:kJ·mol–1)为() A: 462.8 B: 925.5 C: –462.8 D: 241.8

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