Why dilution of an acid is an exothermic reaction?

Question

Answer

Because during this reaction heat is evolved

Answer

Why Dilution of an Acid is an Exothermic Reaction?

Dilution of an acid refers to the process of adding water to an acid to decrease its concentration. The process of dilution is an exothermic reaction that releases heat. The reason for this exothermic behavior can be explained through the concept of enthalpy.

Enthalpy and Dilution

Enthalpy is a thermodynamic property that measures the internal energy of a system. The enthalpy change of a process is the amount of heat energy that is either absorbed or released during the process. The enthalpy change of a dilution process is negative, indicating that heat is released during the reaction.

Intermolecular Forces and Dilution

The exothermic nature of dilution can be explained through intermolecular forces. When an acid is diluted with water, the hydrogen bonding between the water molecules and the acid molecules is disrupted. This leads to a decrease in the strength of the intermolecular forces between the acid molecules. As a result, the acid molecules require less energy to break apart, and heat is released into the surroundings.

Heat of Hydration

The heat of hydration is the amount of heat released when one mole of a substance dissolves in water. The heat of hydration for an acid is negative, indicating that heat is released during the dilution process. This is because the water molecules surround the ions in the acid and stabilize them, leading to the release of heat.

Conclusion

In conclusion, the dilution of an acid is an exothermic reaction that releases heat. This behavior can be explained through the concept of enthalpy, intermolecular forces, and the heat of hydration. Understanding the exothermic nature of dilution is important in many chemical applications, including the preparation of solutions and the study of chemical reactions.

Answer

Dilution of concentrated acid is an exothermic process. If water is added to a concentrated acid, the heat generated may cause the mixture to splash out and cause burns. When the acid is added to water slowly with constant stirring, the mixture will not splash out. So it is recommended that the acid should be added to water and not water to the acid

Answer

When acid is diluted, the acid reacts with water and give off hydrogen gas.. the evolution of hydrogen gas(heat) makes this process exothermic.

Answer

Because large amount of heat is removed out or evolved during this process and hence we consider it as exothermic reaction

Answer

As heat is released during the reaction....

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