Question

Give an equation for endothermic reaction when two elementary gases are involved.

Answer 1

Endothermic reaction are chemical reaction in which the reactants absorb heat energy from the surroundings to form products.

$\underset{\mathrm{water}}{2{\mathrm{H}}_2\mathrm{O}}\to \underset{\mathrm{hydrogen}}{2{\mathrm{H}}_2\left(\mathrm{g}\right)}\uparrow +\underset{\mathrm{oxygen}}{{\mathrm{O}}_2\left(\mathrm{g}\right)}\uparrow$

In the decomposition of water, two elementary gases are involved hydrogen and oxygen. The process is known as electrolysis of water.