(Answered) A cell contains gas at 5300 pa and a machine at one point

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A cell contains gas at 5300 Pa and a machine. At one point, the volume of the box is 39 m3. The machine is turned on remotely and expands the box to volume of 98 m3. During this process, the machine also gives off 850 kJ of heat to the gas. What is the change in internal energy of the gas? Assume the pressure stays constant.

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