A) 68 kJ
B) 65 kJ
C) 57.3 kJ
D) 50 kJ
Correct Answer: C
Solution :
Key Idea: The heat of neutralisation of strong acid by strong base is always constant. (57.3 kJ) It is infact heat of formation of water by \[{{H}^{+}}\] and \[O{{H}^{-}}\] ions. \[{{K}^{+}}O{{H}^{-}}+{{H}^{+}}C{{l}^{-}}\xrightarrow{{}}{{K}^{+}}C{{l}^{-}}+{{H}_{2}}O\] or \[O{{H}^{-}}+{{H}^{+}}\xrightarrow{{}}{{H}_{2}}O\,\,\,\,\Delta H=57.3\,kJ\] \[\because \,\,KOH\] is strong base and \[HCl\] is strong acid.
You need to login to perform this action.
You will be redirected in
3 sec
