A) ? 70 kJ
B) 71.8 kJ
C) ? 244 kJ
D) + 782 kJ
Correct Answer: A
Solution :
\[C+{{O}_{2}}\to C{{O}_{2}},\,\,\,\,\Delta H=-394\,kJ\] ?..(i) \[2{{H}_{2}}+{{O}_{2}}\to 2{{H}_{2}}O,\,\,\,\Delta H=-568\,kJ\] ?.(ii) \[C{{H}_{4}}+2{{O}_{2}}\to C{{O}_{2}}+2{{H}_{2}}O,\,\,\,\Delta H=-892\,kJ\] ?..(iii) (i) + (ii) ? (iii) and find the required result.You need to login to perform this action.
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