The internal energy of a given mass of gas in a system depends upon?

According to the assumptions of the Kinetic Theory of Gases, the molecules do not occupy any volume, and attractive forces are absent between molecules of an ideal gas.

Thus, other parameters such as volume, pressure etc., do not play a significant role in the internal energy of an ideal gas and is a function of temperature only.

For an ideal gas,


where U is the internal energy of the ideal gas.

T is the temperature of the ideal gas.

  • If the temperature of a system rises, the molecules will move faster, therefore have more kinetic energy, and so the Internal Energy will increase.

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