Define `DeltaH`.What will be the sign of `DeltaH` in
(i) exothermic reaction and
(ii) endothermic reaction?

Exothermic reaction and Endothermic reaction :

DeltaH is negative for the reaction

For an exothermic reaction, DeltaH is positive.

How do the strengths of bonds in the reactants compare with those of their counterparts in the products for (i) endothermic reaction? (ii) exothermic reaction?

(a) What do you understned by exothermic and endothermic reactions ? (b) Give one example of an exothermic reaction and one of an endothermic reaction. (c ) Which of the following are endothermic reactions and which are exothermic reactions ? {:((i),"Burning of natural gas",(ii),"Photosynthesis"),((iii),"Electrolysis of water",(iv),"Respiration"),((v),"Decomposition of calcium carbonate",,):}

DeltaH gt DeltaE for the reaction