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3. The constant volume molar heat capacity of acetylene, C2H2(g) is 35.6J/molK. A sample of 65.00g of C2H2(g) is initially at a volume of 40.0L and pressure of 2.00 bar. Calculate q,w,H, and U (all in kJ ) when the gas is heated reversibly at constant pressure until the volume has increased to