8
Question Question 8
Give examples of exothermic reactions i.e. heat evolved in each of the following:
(a) reaction between a solid and a liquid
(b) reaction between two gases
Give two examples of exothermic reactions seen in everyday life.
(a) CaO + H2O ⟶ Ca(OH)2 + Δ
(b) 2H2 + O2 ⟶ 2H2O + Δ
Two examples of exothermic reactions from everyday life are:
- Human Body — Many chemical reactions in our body are exothermic and provide energy to survive.
- Setting of Cement — Cement setting liberates heat hence concrete structures are set slowly.