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Image for When a quantity of monatomic ideal gas expands at a constant pressure of 4.70 X 10^4 Pa, the volume of the gas

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Answer #1

dU = 3/2 *n*R*T

P*dV = n*R*T

so dU = 3/2*P*dV

= 3/2 *4.7*10^4 *(8.25 -2.40)*10^-3

= 412 J

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