WAEC - Chemistry (1991 - No. 17)
Consider the reaction represented by the equation below: H2(g) + 12(s) ⇌ 2HI(g) ∆H negative. Which of the following takes place when the temperature of the reaction vessel is decreased?
the gases condense
the yield of hydrogen increases
the concentration of the reactants remain constant
more of the hydrogen iodide decomposes
the yield of hydrogen iodide increases