What happens during free expansion of real gases? What all parameters are 0?

What happens during free expansion of real gases? What all parameters are 0?

free expansion is in vaccum .. ext pressure = zero ...

What about change in internal energy?

Since there is no temperature change, internal energy remains constant....

@Akash_2019
ΔH= ΔU =ΔW =ΔQ =0

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