heated at a constant pressure

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 (a) When 3.0 mol O2 is heated at a constant pressure of 3.25 atm, its temperature increases from 260 K to 285 K. Given that the molar heat capacity of O2 at constant pressure is 29.4 J K−1 mol−1, calculate q, ΔH, and ΔU.
 (b) When 2.0 mol CO2 is heated at a constant pressure of 1.25 atm, its temperature increases from 250 K to 277 K. Given that the molar heat capacity of CO2 at constant pressure is 37.11 J K−1 mol−1, calculate q, ΔH, and ΔU.

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