4.12Take that portion of the methane initially in the tank that is also in the tank finally to be in the system. This system is isentropic . SSfi=(a) The ideal gas solution SSTTPPNPVRTNPVRTNRTNN Nfi fifiRCiiifffp=⇒=FHGIKJ=FHIK=⇒= ====−=−300357015021964 6 mol;1962176848 314 36......K= mol∆mol(b) Using Figure 2.4-2. 70 bar ≈7 MPa, T= 300 K ±.±if==505 kJ kg K±.,...VmNiii==×=00195073590 kg.35.90 kg
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