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.+43.5 kJ/mol | B.-43.5 kJ/mol | C.-67.7kJ/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.+43.5 kJ/mol | B.-43.5 kJ/mol | C.-67.7kJ/mol | D.+67.7 kJ/mol |