He gas is contained in a one-liter flask that is connected to an empty one-liter

Question

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. ?H is positive and ?S is negative B. ?H is zero and ?S is positive C. ?H is zero and ?S is negative D. ?H is negative and ?S is positive 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. ?H is positive and ?S is negative B. ?H is zero and ?S is positive C. ?H is zero and ?S is negative D. ?H is negative and ?S is positive A. ?H is positive and ?S is negative B. ?H is zero and ?S is positive C. ?H is zero and ?S is negative D. ?H is negative and ?S is positive A. ?H is positive and ?S is negative B. ?H is zero and ?S is positive C. ?H is zero and ?S is negative D. ?H is negative and ?S is positive

Explanation / Answer

C. ?H is zero and ?S is negative

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