Hess's law is also known as

Law of constant heat summation

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Law of constant heat of enthalpy

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Law of constant heat capacity

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None of these

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Solution

The correct option is A Law of constant heat summation
Hess's law also known as Hess’s law of constant heat summation states, “The total amount of heat change in a reaction depends only upon th nature of initial reactants and nature of the final products and is independent of the path or the manner by which this change is brought about ”.

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Hess's law of constant heat summation is based on

(Molar specific heat capacity at constant pressure) - (Molar specific heat capacity at constant volume) is equal to

List 1	List 2
If the gas is monatomic, heat capacity at constant volume	131 J/K
If the gas monatomic, heat capacity at constant pressure	43.7 J/K
If the gas is rigid diatomic, heat capacity at constant pressure	72.7 J/K
If the gas is vibrating diatomic, heat capacity at constant pressure	102 J/K

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