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A balloon is filled with helium gas at 20.0 degrees Celsius at 1.0 atm (1 atm = 1.01 x 10^5 N/m^2). The volume of the balloon after filling is measured to be 8.50 m^3. The helium is then heated at constant pressure until its temperature is 55.0 degrees Celsius. What is he heat flow into the gas?

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