Heat

Heat is the transfer of thermal energy between objects due to temperature differences. It is measured in joules (J), or calories (cal). Heat flows from hotter to colder objects, seeking thermal equilibrium. It is a key concept in thermodynamics.

The amount of heat transferred (Q) can be calculated using the following formula :

Q = mc ΔT

where

• m is mass,
• c is specific heat capacity, and
• ΔT is the temperature change.

Uses of Heat

• Heaters, stoves, and ovens rely on controlled heat transfer for operation.
• Air conditioning systems regulate heat transfer for comfort in buildings.
• Used in processes like metallurgy, refining, and chemical synthesis.
• Excess heat generation contributes to global warming and climate change.
• Heat from the sun is harnessed through solar panels for electricity generation.

Heat and work are related forms of energy transfer. They play important roles in thermodynamics. Heat is energy transferred between systems due to temperature differences, while work is energy transferred through the application of force over a distance. In many thermodynamic processes, both heat and work are involved in changing the state of a system.

In this article, we will discuss about the difference between heat and work.