The iron is heated to 80 degrees Celsius and the heating battery up to 40 degrees Celsius.

The iron is heated to 80 degrees Celsius and the heating battery up to 40 degrees Celsius. Can you say that the iron is cooled to room temperature will transfer a large amount of heat to the environment?

The amount of heat when cooling:

Q = cmΔt,

where c is the heat capacity of aluminum,

Δt is the temperature difference.

The weight of the iron is approximately equal to that of the battery section. The battery contains at least 20 sections:

mу = mb / 20.

Let’s compare the given amount of heat when cooling down to 20 ° С:

Qу = сmу * (80 ° – 20 °) = сmу * 60 °;

Qb = сmb * (40 ° – 20 °) = сmу * 20 * 40 °;

Qу <Qb.

The cooling of the water was not taken into account.

Answer. The battery will give up more heat.