Question

Is there any way of collecting all the heat lost to the environment by 100 ml of water at a temperature of 100 °C when cooled down to room temperature In a room? Give reasons.

Answer 1

Heat & Heat Loss

1. The thermal energy which is being transferred from a hot object to a cold object is known as heat.
2. No process of heat transfer is entirely efficient.
3. This means that if one object is heated, the entire energy of the heat source does not travel to the required object. Some amount of heat is lost to the surrounding.

Collecting the heat lost to the environment

1. The heat cannot be collected that has been lost to the environment.
2. Once the heat has been lost, it has been converted to the lowest form of energy, called unusable energy, and cannot be collected.

Hence, the amount of heat lost to the environment by 100 ml of water at a temperature of 100 °C cannot be collected when it is allowed to cool down in a room.