题目内容
己知:HCN(aq)与NaOH(aq)反应的△H=-12.1kJ/mol;HCl(aq)与NaOH(aq)反应的△H=-55.6kJ/mol。则HCN在水溶液中电离的△H等于
- A.-67.7 kJ/mol
- B.-43.5 kJ/mol
- C.+43.5 kJ/mol
- D.+67.7 kJ/mol
C
根据能量守恒定律可知,HCN在水溶液中电离的△H=-12.1 kJ/mol+55.6kJ/mol=+43.5 kJ/mol,答案选C。
根据能量守恒定律可知,HCN在水溶液中电离的△H=-12.1 kJ/mol+55.6kJ/mol=+43.5 kJ/mol,答案选C。
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己知:HCN(aq)与NaOH(aq)反应的ΔH=-12.1 kJ/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. |
-43.5kJ/moL |
C. |
+67.7 kJ/moL |
D. |
+43.5 kJ/moL |
己知:HCN(aq)与NaOH(aq)反应的△H="-12.1" kJ/mol;HCl(aq)与NaOH(aq)反应的△H=-55.6kJ/mol。则HCN在水溶液中电离的△H等于( )
A.-67.7 kJ/mol | B.-43.5 kJ/mol |
C.+43.5 kJ/mol | D.+67.7 kJ/mol |
己知:HCN(aq)与NaOH(aq)反应的DH= -12.1kJ/mol;HCl(aq)与NaOH(aq)反应的DH= -55.6kJ/mol。则HCN在水溶液中电离的DH等于
A.-67.7 kJ/mol | B.-43.5 kJ/mol |
C.+43.5 kJ/mol | D.+67.7 kJ/mol |