A) 196 kJ
B) ? 196 kJ
C) 984 kJ
D) ? 984 kJ
Correct Answer: A
Solution :
\[{{H}_{2}}+\frac{1}{2}{{O}_{2}}\to {{H}_{2}}O\,\,\,\Delta H=-188\,kJ/mole\] ..?..(i) \[{{H}_{2}}+{{O}_{2}}\to {{H}_{2}}{{O}_{2}};\,\,\,\Delta H=-286\,kJ/mole\] ..?.(ii) By 2 × (i) and (ii) \[2{{H}_{2}}+{{O}_{2}}\to 2{{H}_{2}}O\,;\,\,\Delta H=-376\,kJ/mole\] ?..(iii) \[2{{H}_{2}}+2{{O}_{2}}\to 2{{H}_{2}}{{O}_{2}}\,\,\,\Delta H=-572\,kJ/mole\] ?..(iv) By (iii) ? (iv) \[2{{H}_{2}}{{O}_{2}}\to 2{{H}_{2}}O+{{O}_{2}}\,\,\,\Delta H=+196\,kJ\].
You need to login to perform this action.
You will be redirected in
3 sec
