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Define the terms heat and temperature.
Heat:
Heat is the energy that is transferred from the body to others in thermal contact with each other as a result of the difference in temperature between them.
Temperature:
The temperature of a body is the degree of hotness or coldness of the body.
Define the terms of thermal conduct and thermal equilibrium.
Thermal conduct:
In heat transfer and thermodynamics, a thermodynamic system is said to be in thermal conduct with another system if it can exchange energy with it through the process of heat.
Thermal equilibrium:
Thermal equilibrium - When two objects A and B are in thermal contact and there is no net transfer of thermal energy from A to B or from B to A, they are said to be in thermal equilibrium.
Define the terms of energy in transit and internal energy.
Energy in transit:
The form of energy that is transferred from a hot body to a cold body is called heat. Thus, Heat is, therefore, called the energy in transit.
Once heat enters a body, it becomes its internal energy and no longer exists as heat energy.
Internal energy:
The sum of kinetic energy and potential energy associated with the atoms, molecules, and particles of a body is called its internal energy.
The internal energy of a body depends on many factors such as the mass of the body, kinetic and potential energies of molecules, etc.
