Question

give any three example of exothermic raction

Answer 1

h20 + cacl2

Condensation of rain from water vapor

Cement and concrete setting

Combustion of fuels

Answer 2

Exothermic reactions are reactions that give out energy into the surroundings.

Like when you carry out: (chemical reactions)

(1) Combustion, example you light up a candle

(2) Respiration, you release energy along with carbon dioxide and water during this process

(3) Neutralization, when you mix an acid with a base together [Eg. HCL and NaOH]

(4) Haber process, the process where ammonia is made from nitrogen and hydrogen

Or when you carry out: (physical reactions)