Write a balanced chemical equation for the production of hydrogen gas.

The decomposition of sulphur trioxide is an endothermic process: $2{\mathrm{SO}}_3\left(\mathrm{g}\right)\stackrel{ }{\rightleftharpoons }2{\mathrm{SO}}_2\left(\mathrm{g}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right); ∆\mathrm{H}=+196 \mathrm{kJ} {\mathrm{mol}}^{-1}$. Predict the effect of the following change on the position of the equilibrium:

Sulphur trioxide gas is removed from the system at equilibrium.

The decomposition of sulphur trioxide is an endothermic process: $2{\mathrm{SO}}_3\left(\mathrm{g}\right)\stackrel{ }{\rightleftharpoons }2{\mathrm{SO}}_2\left(\mathrm{g}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right); ∆\mathrm{H}=+196 \mathrm{kJ} {\mathrm{mol}}^{-1}$. Predict the effect of the following change on the position of the equilibrium:

Oxygen gas is removed from the system at equilibrium.

The decomposition of sulphur trioxide is an endothermic process: $2{\mathrm{SO}}_3\left(\mathrm{g}\right)\stackrel{ }{\rightleftharpoons }2{\mathrm{SO}}_2\left(\mathrm{g}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right); ∆\mathrm{H}=+196 \mathrm{kJ} {\mathrm{mol}}^{-1}$. Predict the effect of the following change on the position of the equilibrium:

The pressure of the system is increased.

The decomposition of sulphur trioxide is an endothermic process: $2{\mathrm{SO}}_3\left(\mathrm{g}\right)\stackrel{ }{\rightleftharpoons }2{\mathrm{SO}}_2\left(\mathrm{g}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right); ∆\mathrm{H}=+196 \mathrm{kJ} {\mathrm{mol}}^{-1}$. Predict the effect of the following change on the position of the equilibrium:

The temperature of the system is decreased.