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OSCOLPHYS$201615\mathrm{.}2.$WA$.$OT$1.$

In the graph below, each unit on the horizontal axis is $1\mathrm{.}70{10}^{-3}{m}^3$ and each unit on the vertical axis is $0\mathrm{.}3$ atm.

$($a$)$ Determine the change in internal energy of the gas if $2502$ J of heat is added as it expands in volume along the direct path CA$.$

$$ J

$($b$)$ To get the same change in internal energy, how much heat must be added to the gas as it goes along the path CBA?

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