The volume of a system becomes twice its P original volume on the a...

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The volume of a system becomes twice its
P original volume on the absorption of 300 cal of

W heat. The work done on the surrounding was found to be 200 cal. What is \( \Delta U \) for the system?
(1) \( 500 \mathrm{cal} \)
(2) \( 300 \mathrm{cal} \)
(3) \( 100 \mathrm{cal} \)
(4) \( -500 \mathrm{cal} \)
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