Question

Catalyst in exothermic reaction and endothermic reaction

Answer 1

Answer:

catalyst help to speed up the reaction by lowering in activation energy of the reactants .it speed up the reaction equally either it's an exothermic or endothermic reaction.

Answer 2

Answer:

Explanation:

(i) A reaction in which heat is given away when

reactants are transformed into the products is

called as exothermic reaction.

(ii) e.g. formation of ice from water, dissolution of

sodium hydroxide in water.

(iii) When solid NaOH is dissolved in water, heat

is given out and therefore, the temperature

increases.

(iv) NaOH(s) + H2

O(l) → NaOH(aq) + Heat

Sodium

hydroxide

Water Sodium hydroxide

solution