Question

How are calorimetry and Hess's Law used to find the heat of neutralization of ammonia and...

How are calorimetry and Hess's Law used to find the heat of neutralization of ammonia and acetic acid?

Why are the heat of neutralizations values negative?

Explain why it is important to know if energy is being released or absorbed during a chemical rection?

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Answer #1

The Rxn between Ch3COOH and NH is

ammonium acetate

The Rxn between acid and base is called neutralisation reaction and the heat evolved during the reaction is called heat of neutralisation.

The reaction between acid and base is always exothermic. Strong acid and strong base are moreexothermic.

Mean heat evolved is maximum. Negative value of H means reaction is exothermic heat is coming out from reaction and vice-versa.

Heat of neutralisation means Acid - Base.

Acid + Base -- Salt + water.

Salt are more stable than acid and base so heat is coming out from rxn and their values are negative.

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