NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. A piston-cylinder device contains a mixture of 0.4 kg of H2 and 1.2 kg of N2 at 100 kPa and 300 K. Heat is now transferred to the mixture at constant pressure until the volume is doubled. Assume constant specific heats at the average temperature. Problem 13.067.a Piston Determine the heat transfer. Use the table containing the ideal-gas specific heats of various common gases. The heat transfer is kJ.

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Part D and E SOLVE CAREFULLY PART D Using the P–v and T–s diagrams show that in the isobaric process the saturated vapor state can be reached for arbitrary initial steam quality x1 whereas in the isentropic process the saturated vapor state can be attained only for x1 above a certain threshold value. What is the phase description of water in the final state when the saturation line is reached from the initial state below the threshold value? PART E : Determine this threshold value of x1 for the isentropic process with the initial temperature T1 = 150°C.