JAMB - Chemistry (1979 - No. 29)
The reaction between hydrogen and iodine may be represented by the equation H2(g)+ I2(g) → 2HI(g), and is exothermic. Therefore
an increase in temperature favours the forword reaction
an increase in pressure favours the backward reaction
both pressure and temperature muct be increased to favour the forward reaction
a decrease in temperature will favour the forward reaction
a decrease in pressure and an increase in temperature will favour the forward reaction