Question

classify the following chemical reaction as an exothermic or endothermic number (1) electrolysis of water number (2) burning of natural gas number (3) decomposition of calcium carbonate number (4) burning of magnesium ribbon in air​

Answer 1

Endothermic :- involve heat

Exothermic :- Evolve heat

1 ) Endothermic Coz , Electricity as heat is needed.

2 ) Exothermic Coz , heat is released while burning Natural gas.

3 ) Endothermic Coz, Heat is needed to break down.

4 ) Exothermic Coz , While reacting with oxygen it release heat .

MARK AS BRAINLIST