WAEC - Chemistry (2001 - No. 18)
A reaction is represented by the equation below. A2(g) + B2(g) → 2AB(g); ∆H = +X kJmol-1 Which of the following statements about the system is correct?
The reaction goes to completion at equilibrium
The forward reaction is exothermic
At equilibrium increase in temperature favours the reverse reaction
Pressure has no effect on the equilibrium mixture
Explanation
The total number of moles of gaseous substances on the LHS = The total number of moles of gaseous product on the RHS.
1 + 1 = 2
2 = 2
Therefore, pressure has no effect on the system in equilibrium.
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