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Question completion Status QUESTION 1 A piston cylinder device contain: 0.8 kg of steam at 250°C and 1 MPa (1 Mpa 1000 kPa). Steam is cooled at constant pssure until one half of the mass conden: a. What is the mass of vapour in the mixture and the value of quality x of the mixture b. Use the tables to find the initial specific volume vi and initial volume V1 cFind the value of the final volume V2 after condensation d. Find the specific enthalpy h2 and the enthalpy H2 of the mixture Arial ET TTTT Paragraph * DO QE Sx Mashups 3 (12pt) S T' T. Click Save and Submit to save and submit. Click Save All Answers to save all answers. MacBook Air

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Given mass m= 0.8 kg 250°C IMPa Initial Temperature Ti= 250°c in had Pressure P - IMPa At the final stake the cylinder costains Saturated suid-Vapocs metre, and thus the final temperature must be the Saturation temperature of the final pressure Final Pressure is (MPa (coastant pressure procesi A Final temperature T2 = Tsat at Impa Tsalad 10 bar ~ 179.88°C (from Steamtible) The 13 Specchied SOY quakty at the froal State 22 os The specefic Volume at the initial and final states are Picima, T, 2250°C Vi - 0.232625 ml lles [ super heated State Pirlobaw, 712250°C] w P2 = 10bar Vf 2 0.001127 yet from steam table V 2220-5 5 p0.19436wdk Vf + R2 Ysg = 0.001129+0.5(0-19436-0001127) 0.09775 m²/kg. CScanned with CamScanner

Mass of Vapour in the mixture 1x08 - 0'4 . 04 Value of 0.6 (b Inikzal specific volume ve, : 0 232625 ming Initial volume V = 0.8 X 0.03a625 0.186 m final specific volume U = 0.09775 m3lky. Final volume Vz 2 muz 206x0.09775 20.0782 m3 specific enthalpy b2 z hft &z haq hf = 762-8 kJ/kg hg 2 2728 ks/kg h2 2 762.8+0.5x 0.5x2748–7628) 1770-4 kjlky 2 Enthalpy H₂ = nha 0.8 *1770.4 1416.32 KT Scanned with CamScanner