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  4. When 2 litre of ideal gas expands isothermally into vacuum to a total volume of 6 litre, the change in internal energy is J. (Nearest integer)

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Q. When 2 litre of ideal gas expands isothermally into vacuum to a total volume of 6 litre, the change in internal energy is ______$J$. (Nearest integer)

JEE MainJEE Main 2023Thermodynamics

Solution:

For ideal gas $U=f(T)$
and for isothermal process, $\Delta U =0$