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MHT-CET : Physics Entrance Exam

MHT - CET : Physics - Kinetic Theory of Gases Glossary

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         Free Path: Distance covered between two successive collisions is called free path.

         Mean Free Path: The average distance travelled by a molecule between two successive collisions is known as the mean free path.

         Mean Square Velocity: The average of the squares of the velocities of the individual molecules is known as the mean square velocity.

         Root Mean Square Velocity (RMS Velocity): The square root of the mean of the squares of the individual velocities of different molecules of the gas at a given temperature.

         Specific Heat: The specific heat of a substance is the amount of heat required to raise the temperature of unit mass of the substance through one degree.

         Molar Specific Heat: The quantity of heat required to raise the temperature of a mole of the substance through one degree.

         Internal Energy: The increase in the kinetic energy of the molecules of a gas is called the increase in its internal energy.

         Principal Specific Heat of a Gas at Constant Volume (cv): It is the amount of heat required to raise the temperature of unit mass of the gas through one degree keeping the volume constant.

         Principal Specific Heat of a Gas at Constant Pressure (cp): It is the amount of heat required to raise the temperature of unit mass of the gas through one degree while keeping the pressure constant.

         Internal Latent Heat: Internal latent heat is the part of the latent heat which is required to do work against intermolecular force of attraction so that intermolecular distance changes, i.e., there is a change in the state of the substance at constant temperature and pressure.

         External Latent Heat: External latent heat is the part of the latent heat required to do work against the external pressure during the change in volume at constant temperature and pressure.

         Molar Specific Heat of a Gas at Constant Pressure: It is the amount of heat required to raise the temperature of one mole of the gas through one degree while keeping the pressure constant.

         Molar Specific Heat of a Gas at Constant Volume: It is the amount of heat required to raise the temperature of one mole of the gas through one degree while keeping the volume a constant.

         Latent Heat: It is the energy required to change the state of a substance at constant temperature (melting point/boiling point).

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