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A gas expands in an insulated container ...

A gas expands in an insulated container against a constant external pressure of 1.5 atm from an initial volume of 1.2 L to 4.2 L. The change in internal energy `(deltaU)` of gas is nearly (1 L-atm = 101.3 J)

A

-456J

B

+456J

C

-402J

D

+402J

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