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Calculate the workdone, and change in in...

Calculate the workdone, and change in internal enegry taking place when an ideal gas undergos isothermal expansion.

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a. `DeltaU` for an ideal gas, `U` depends on temperature. Since temperature is constant
`rArr DeltaU = 0`
b. According to the first law
`DeltaU = dq +dW`
Since `DeltaU =0`
`:. dq=- dw`
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