Question

When ammonium chloride is dissolved in water the solution becomes cold because (1) Heat of solution of ammonium chloride is positive. (2) Heat of solution of ammonium chloride is negative. (3) Heat of dilution of ammonium chloride is positive. (4) Heat of formation of ammonium chloride is positive.

Name: Problem 21, Chapter 6: Objective Chemistry for Engineering and Medical Entrance Examinations
Uploaded: 2022-01-25T09:10:57-08:00
Duration: 58 s
Channel: Mishal Gul
Description: When ammonium chloride is dissolved in water the solution becomes cold because (1) Heat of solution of ammonium chloride is positive. (2) Heat of solution of ammonium chloride is negative. (3) Heat of dilution of ammonium chloride is positive. (4) Heat of formation of ammonium chloride is positive.

   When ammonium chloride is dissolved in water the solution becomes cold because
(1) Heat of solution of ammonium chloride is positive.
(2) Heat of solution of ammonium chloride is negative.
(3) Heat of dilution of ammonium chloride is positive.
(4) Heat of formation of ammonium chloride is positive.

Objective Chemistry for Engineering and Medical Entrance Examinations

K Rama Rao 1st Edition

Chapter 6, Problem 21

Instant Answer

Solved by Expert Mishal Gul

01/25/2022

Step 1

The process of dissolving involves breaking the ionic bonds in the ammonium chloride and forming new bonds with the water molecules. This process can either absorb heat (endothermic) or release heat (exothermic). Show more…

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When ammonium chloride is dissolved in water the solution becomes cold because (1) Heat of solution of ammonium chloride is positive. (2) Heat of solution of ammonium chloride is negative. (3) Heat of dilution of ammonium chloride is positive. (4) Heat of formation of ammonium chloride is positive.

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Key Concepts

Endothermic Process

An endothermic process is one in which energy is absorbed from the surroundings, typically in the form of heat. In the context of dissolving a substance in water, if the process is endothermic, it results in a cooling effect as the system absorbs thermal energy to break apart the solute molecules.

Heat of Solution

The heat of solution is the enthalpy change when a substance dissolves in a solvent. When this value is positive, it indicates that the substance absorbs heat from the surroundings during the dissolution process, which leads to a decrease in the temperature of the solution.

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