Discuss the factors which influence the value of enthalpy change in ch

1.	Discuss the factors which influence the value of enthalpy change in chemical reactions.
Answer» The enthalpy change depends upon the following factors: (i) Chemical composition of the reactants:- The amount of heat released or absorbed depends upon the strength of the chemical bonds of the products relative to those of the reactants. (ii) Amount of the reactants:- The value of heat change in a reaction depends upon the amounts of the reactants. The value of ΔH is expressed in such away that it indicates the amount of material as well as quantity of heat. (iii) Conditions of a reaction:- The amount of heat change in a reaction also depends upon the physical state of the reactants as well as products. Therefore, it is essential to indicate the physical state of every reactant and product of a reaction.

Discuss the factors which influence the value of enthalpy change in chemical reactions.

Answer»

The enthalpy change depends upon the following factors:

(i) Chemical composition of the reactants:- The amount of heat released or absorbed depends upon the strength of the chemical bonds of the products relative to those of the reactants.

(ii) Amount of the reactants:- The value of heat change in a reaction depends upon the amounts of the reactants. The value of ΔH is expressed in such away that it indicates the amount of material as well as quantity of heat.

(iii) Conditions of a reaction:- The amount of heat change in a reaction also depends upon the physical state of the reactants as well as products. Therefore, it is essential to indicate the physical state of every reactant and product of a reaction.

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