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In a thermally isolated system, two boxe...

In a thermally isolated system, two boxes filled with an ideal gas are connected by a valve. When the valve is in closed position, states of the box 1 and 2, respectively, are (1 atm, V, T) and (0.5 atm, 4V, T). When the valve is opened, the final pressure of the system is approximately

A

0.5atm

B

0.6atm

C

0.45atm

D

1.0atm

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