Physics - Heat & Thermo Question with Solution | TestHub
There are two identical chambers, completely thermally insulated from surroundings. Both chambers have a partition wall dividing the chambers in two compartments. Compartment is filled with an ideal gas and Compartment is filled with a real gas. Compartments and are vacuum. A small hole (orifice) is made in the partition walls and the gases are allowed to expand in vacuum.
No change in the temperature of the gas takes place when ideal gas expands in vacuum. However, the temperature of real gas goes down (cooling) when it expands in vacuum.
The internal energy of an ideal gas is only kinetic. The internal energy of a real gas is kinetic as well as potential.
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Answer:
Solution:
In ideal gases the molecules are considered as point particles and for point particles, there is no internal excitation, no vibration and no rotation. For an ideal gas the internal energy can only be translational kinetic energy and for real gas both kinetic as well as potential energy.