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“The quantity of heat which must be supplied to decompose a compound into its element is equal to the heat evolved during the formation of that compound from the elements.” This statement is known as

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Hess's law

Joule's law

Le-Chatelier's principle

Lavoisier and Laplace law

answer is D.

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Detailed Solution

It is Lavoisier and Laplace law. This is another law of thermochemistry which was put forward before Hess's law.

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