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in case of HF more energy is released, and for anything to be stable it wants to release as much energy as possible, then why is HCl more stable

Asked by anirbanbag81 15th December 2017, 11:45 AM
Answered by Expert

Heat of formation may be positive or negative.

If ΔH is positive it is exothermic.

If ΔH is negative it is endothermic.

Stability of exothermic compound is more than that of endothermic compound, therefore greater the liberated energy greater is the stability.

Here, Enthalpy of formation of HF is -161kj and HCl is -92kj

Hence, HFis more stable than HCl.
Answered by Expert 18th December 2017, 5:56 PM
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