Question

A frictionless cylinder-plunger device contains 0.88 lbm of carbon dioxide initially at 20 psia and 40 ° F. Heat is supplied from a heat source at 740 ° F until the volume occupied by the gas doubles. Determine, in Btu, (a) the quantity of heat supplied, (b) the exergy of the final state, and (c) the reversible useful work associated with the global process if the process is at constant pressure, To = 60 ° F and Po = 14.7 psia.

Answer 1

Som in @ Given: A Priction less Cylinder – plunger device we can Deterniine the three eases. We have to Determines the quantity of heat supplied in the Unit of Bru parameter values can be taken by Every thermal properties of carbon dioxide At state 2 : From Here the volti 12/02 T= ( 12 ) T2= 2(40) = 80 F ist Law of thermodynamics :=w+du = P(V2-4) + mv (12-1) (3) Pro] Cos. Density will be tm Gen) (5-1) 0.3.) 180-40) Near 20 0.08 0.6 Taken from the Properties of turbon Dioxide 0.033 1310 2 526.94+ 5.374 =1532-32 Bri TO Find the energy of Final state in Bre e, final m (ha-Tosa) 0.780 Bru in Enthalpy and Entropy CS2) also taken from the Physical therneal properties of Coz at 607 & 14:7psia E (008) [0.1 -(60) 60-013)) (we can searen lega Google we get The Reversible Useful work transfer compaying of energy- Ewa wa w-Poll2-4) P(V2 -U,) -Po (124) - G-Po) limon = (20–14.1) (3:09) Ew = 140.0 Bru the values) ©