Chemistry WCH01: Chemical Equilibria Topical Past Paper Questions

This question is about the chemistry of methanol. (a) Methanol can be synthesised by the reaction of carbon monoxide with hydrogen. $$ \mathrm{CO(g)+2H_{2}(g)\rightleftharpoons CH_{3}OH(g)} $$ A mixture of 18.5 mol of carbon monoxide and 13.5 mol of hydrogen was allowed to reach…

Methanol is produced by the catalysed reaction between carbon monoxide and hydrogen: $$ \mathrm{CO}(g)+2\mathrm{H}_{2}(g)\rightleftharpoons\mathrm{CH}_{3}\mathrm{OH}(g)\qquad\quad\Delta H=-90\mathrm{kJ}\mathrm{mol}^{-1} $$ (a) The equilibrium yield of methanol is favoured by both…

The dissociation constant for water, $ K_{w} $, increases with increasing temperature. Which of these statements about the effect of increasing temperature is correct? ☒ A Water becomes acidic. ☒ B Water becomes alkaline. ☒ C The pH of water decreases. ☒ D In water, $ [H_{3}O^{+}…