Internal energy

First Law of Thermodynamics

Internal energy of a system is the total energy possessed by the system due to its molecular motion and molecular configuration. Heat and work are two distinct modes of energy transfer which results in the change in the system’s internal energy.
Thermodynamics state of sy
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Heat Engines

A heat engine is a device that converts heat energy into mechanical energy. Hot reservoir, working substance and cold reservoir are the three parts of heat engine.  Thermal efficiency of heat engine is the ratio of net work done per cycle by the engine to the total amount of heat absorbed from ....Read More

Laws Related to Heat and Temperature

All bodies emit thermal radiations. Prevost’s theory of heat exchange says that substances at all finite temperatures emit radiations, the amount of which increases with the increase in temperature. It is not even affected by the presence of surrounding bodies. The temperatures of a body could eit ....Read More

Second Law

Reversible processes are the processes which can be made to proceed in the reverse direction by a very slight change in its conditions so that the system passes through the same states as in direct process, and at the conclusion of which the system and its surroundings acquire the initial conditions ....Read More

Thermal Conduction and Convection

Transmission of heat takes place through conduction, convection and radiation. Conduction is the mode of transmission of heat due to which heat travels through an unequally heated body, from the hot end to the cold end from particle to particle without any movement in the mean positions of the parti ....Read More

Thermal Equilibrium

Two bodies at different temperatures come in contact with each other, the heat flows from the body at higher temperature to the body at lower temperature until they attain the same temperature. The branch of physics which deals with the perceptions of heat and temperature and the inter conversion of ....Read More

Thermal Radiations

Radiation is the mode of transmission of heat, wherein, heat travels from one point to another with the velocity of light without heating the intervening medium. The energy emitted by a body in the form of radiation due to its temperature is called thermal radiation.
Thermal radiations travel in
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Thermodynmic Processes

Thermodynamics Process is a process by which one or more parameters of thermodynamic system undergo a change. There are various types of thermodynamic process : Quasi – static process, Isothermal process, Adiabatic process, Isobaric process, Isochoric process.  Quasi-static process is an infi ....Read More

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