He gas is contained in a one-liter flask that is connected to an empty one-liter flask with a closed stopcock between the two flasks.When the stopcock is opened some of the He enters the evacuated flask.For this system
A) ΔH is negative and ΔS is positive
B) ΔH is zero and Δ△S is positive
C) ΔH is zero and ΔS is negative
D) ΔH is positive and ΔS is negative
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