The internal energy of ideal gas is:
Correct answer: A. Totally K.E
- A. Totally K.E
- B. Partly K.E and partly P.E
- C. Totally P.E
- D. Neither K.E nor P.E
Explanation
The internal energy changes in an ideal gas can be described solely by change in its kinetic energy. Kinetic energy is simply considered as the internal energy of the perfect gas and depends entirely on its pressure, volume, temperature. In an ideal gas, the intermolecular forces are assumed to be absent and all the collisions are perfectly elastic. Thus, the gas possesses only translational kinetic energy and hence, the internal energy of the ideal gas depends only on the temperature.
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About First Law of Thermodynamics
The first law relates heat supplied, work done and the change in internal energy through energy conservation. Problems use sign conventions and apply the law to isothermal, adiabatic, isobaric and isochoric processes. Internal energy is a state function, while heat and work depend on the path followed.
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