Chapter 19, Problem 5STP

To determine

To Choose: The correct option.

Answer to Problem 5STP

The correct option is (D).

Explanation of Solution

Introduction:

If the reaction is carried by using the external energy is called endothermic reaction. In this reaction, energy absorbs heat from its surroundings.

Reactants +Heat $\to$ Products

Iron rusting, burning of wood and exploding dynamite are releases heats to surrounding. So these are exothermic reactions.

Magnesium sulfate is commonly known as Epson salt. Epson salt is insoluble in water at room temperature. In order to dissolve the Epson salt in water, heat from the external source is required.

Thus, mixing of Epson salt is endothermic reaction.

Hence, the correct option is (D).

Conclusion:

Hence, mixing of Epson salt is endothermic reaction.