Q. The value of ΔH for the reaction X₂(g) + 4Y₂(g) ⇌ 2XY₄(g) is less than zero. Formation of XY₄(g) will be favoured at
A) High pressure and low temperature
B) High temperature and high pressure
C) Low pressure and low temperature
D) High temperature and low pressure
Explanation
[Solution from source] The forward reaction reduces gas moles from 5 to 2, so high pressure shifts it forward (Le Chatelier). It is exothermic (ΔH < 0), so low temperature favours products. Hence high pressure and low temperature. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.