Question

Complete and balance the following equation:

$\dot{}\dot{}\dot{}\dot{}\dot{}\dot{}\dot{}\dot{}\dot{}\dot{}\dot{}\dot{}\dot{}\dot{}\dot{}\dot{}\dot{}\dot{}\dot{}\dot{}\dot{}+5{\mathrm{O}}_2=4{\mathrm{CO}}_2+2{\mathrm{H}}_2\mathrm{O}+\mathrm{Heat}$

Answer 1

1. This is the combustion reaction of acetylene.

2. When acetylene burns in air, $2$ moles of acetylene reacts with the $5$ moles of oxygen to form $4$ moles of carbon dioxide and $2$ moles of water.

3. Huge amount of heat energy is liberated, since the reaction is exothermic.

So, the balanced chemical reaction is:

$2{\mathrm{C}}_2{\mathrm{H}}_2\left(\mathrm{g}\right)+5{\mathrm{O}}_2\left(\mathrm{g}\right)\to 4{\mathrm{CO}}_2\left(\mathrm{g}\right)+2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{g}\right)$