Chemical Engineering Thermodynamics
In case of the decomposition of hydroiodic acid (2HI ⇋ H₂ + I₂), addition of H₂ (at equilibrium condition) will

Decrease the partial pressure of HI
Increase the partial pressure of I₂
None of these
Diminish the degree of dissociation of HI

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Chemical Engineering Thermodynamics
Claussius-Clayperon equation gives accurate result, when the

Vapour pressure is relatively low and the temperature does not vary over wide limits
Vapour obeys the ideal gas law and the latent heat of vaporisation is constant
All of these
Volume in the liquid state is negligible compared with that in the vapour state

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