What will happen if more heat is applied to the following system at equilibrium? X2(g)...

WAEC 2001

What will happen if more heat is applied to the following system at equilibrium? X2(g) + 3Y 2(g) ⇌ 2XY3(g); ∆H =-kJmol -1

A. the yield of XY ₃ will decompose
B. more of XY₃ will decompose
C. More of X₂ will react
D. the forward reaction will go to completion

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Correct Answer: Option B

Explanation

If more heat is applied to an exothermic reaction in equilibrium, it means temperature is increased, this will however, cause the equilibrium shift to the left. This means the product will decompose to produce more of the reactants on the LHS. i.e XY\(_3\) will decompose.

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