Question

Give two example in case which brings about chemical action due to heat

Answer 1

An example of chemical action due to heat is,

$\underset{\mathrm{zinc}\mathrm{carbonate}}{\underset{}{{\mathrm{ZnCO}}_3}}\stackrel{∆}{\to }\underset{\mathrm{zinc}\mathrm{oxide}}{\underset{}{\mathrm{ZnO}}}+\underset{\mathrm{carbon}\mathrm{dioxide}}{\underset{}{{\mathrm{CO}}_2\left(\mathrm{g}\right)}}$

1. Zinc carbonate on heating produces zinc oxide and carbon dioxide.
2. Photosynthesis of plants absorbs heat energy from sunlight to convert carbon dioxide and water into glucose and oxygen.

$\underset{\mathrm{carbon}\mathrm{dioxide}}{\underset{}{6{\mathrm{CO}}_2}}+\underset{\mathrm{water}}{\underset{}{12{\mathrm{H}}_2\mathrm{O}}}+∆\to \underset{\mathrm{glucose}}{\underset{}{{\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6}}+\underset{\mathrm{carbon}\mathrm{dioxide}}{\underset{}{6{\mathrm{CO}}_2}}+\underset{\mathrm{water}}{\underset{}{6{\mathrm{H}}_2\mathrm{O}}}$