Question

A hot pack contains chemicals that can be activated to produce heat. A cold pack contains chemicals that feel cold when activated. A cold pack is placed on an injured leg. Indicate the direction of the flow of energy between the leg and the cold pack.

Answer 1

The flow of energy between the injured leg and the cold pack is from the leg to the cold pack. When the cold pack is applied to the leg, the ammonium nitrate inside the pack dissolves in water, which is an endothermic process that absorbs heat from the body. This absorption of heat helps to limit swelling and provides a cooling sensation.

Step-by-step explanation:

The flow of energy between the injured leg and the cold pack is from the leg to the cold pack.

When the cold pack is applied to the leg, the ammonium nitrate inside the pack dissolves in water, which is an endothermic process that absorbs heat from the body.

This absorption of heat helps to limit swelling and provides a cooling sensation.

Answer 2

Explanation is given below.

Step-by-step explanation:

The cold pack is applied on the injured part of body only the place where the type of injury is Sprain, swelling, or any other internal small injury. This is applied to lower the flow of blood in that particular area which reduces the further inflammation of that area.

For the applied pack the direction of the flow of the heat will be towards the cold pack which will absorb the heat of the injured part as the heat always flows from higher temperature to the lower temperature.

This method of treatment of an injury is the instant way of treating an injury which prevents further problem to the injury by reducing the blood flow to the site and cooling the affected area.