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A gas is allowed to expand in a well ins...

A gas is allowed to expand in a well insulated container against a constant external pressure of 2.5 atm from an initial volume of 2.50 L to a final volume of 4.50 L . The change in internal energy `Delta U` of the gas in joules will be -

A

`1136.25` J

B

`-500` J

C

`-505` J

D

`+505` J

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