Consider a pistoncylinder assembly containing 0.12 kg of nitrogen at 300 K and 1 atm (state 1).

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Consider a piston–cylinder assembly containing 0.12 kg of nitrogen at 300 K and 1 atm (state 1). The nitrogen is heated at constant pressure to 700 K (state 2). Plot process in P–v and T–v coordinates. Assuming a constant value of the constant-pressure specific heat of 1.067 kJ/kg · K for the N₂, determine the following quantities: ₁W₂, ΔU, ΔΗ, and ₁Q₂. Give units.

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ANSWER To plot the process in Pv and Tv coordinates we need to determine the initial and final states of the nitrogen and calculate the specific volume v at each state Initial State State 1 Temperature T1 300 K Pressure P1 1 atm Mass m 012 kg Constantpressure specific heat cp 1067 kJkg K Using the ideal gas law we can calculate the initial specific volume v1 RT1P1 00287 m3kg Final State State 2 Temperature T2 700 K Pressure P2 1 atm constant pressure process Mass m 012 kg Constantpressure specific heat cp 1067 kJkg K Using the ideal gas law we can calculate the final specific volume v2 RT2P2 00668 m3kg Now we can plot the process on a Pv diagram and a Tv diagram Pv diagram The process is a constant pressure process so it is a horizontal line on the Pv diagram The initial state is at point 1 with v1 00287 m3kg and P1 1 atm The final state ...View the full answer

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