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Is the formula DeltaU=nCvDeltaT, only applicable to ideal gases, if so can you point out in the derivation of this formula what thing do we assume that makes this formula only applicable for ideal gases?
Accepted Answer
The formula DeltaU=nCvDeltaT is applicable to any system that can be described by the ideal gas law. This includes both ideal gases and real gases at low pressures. The derivation of this formula assumes that the gas molecules are non-interacting and that their kinetic energy is directly proportional to the temperature. These assumptions are not valid for real gases at high pressures, which is why the formula DeltaU=nCvDeltaT is not applicable to them.
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