已知:HCN(aq)与NaOH(aq)反应的ΔH= -12.1kJ/mol;HCl(aq)与NaOH(aq)反应的ΔH= -55.6 kJ/mol,则HCN在水溶液中电离的ΔH等于
A.-67.7 kJ/mol | B.-43.5 kJ/mol |
C.+43.5 kJ/mol | D.+67.7 kJ/mol |
已知:HCN(aq)与NaOH(aq)反应的ΔH= -12.1kJ/mol;HCl(aq)与NaOH(aq)反应的ΔH= -55.6 kJ/mol,则HCN在水溶液中电离的ΔH等于
A.-67.7 kJ/mol | B.-43.5 kJ/mol |
C.+43.5 kJ/mol | D.+67.7 kJ/mol |