A) +97 kJ
B) -97 kJ
C) +10 kJ
D) -10 kJ
Correct Answer: B
Solution :
Heat of formation is the amount of heat absorbed or liberated when one mole of a substance is formed by its constituent element. When 2 moles of HCl is formed, the heat liberated =194 kJ. As when 1 mol of HC1 is formed the heat liberated \[=\frac{194}{2}=97\,kJ\] So, \[\Delta {{H}_{f}}=-97\,kJ.\] Hence, the correct option is [b].You need to login to perform this action.
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