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PGE_312_Spring10_Solution_HW2

# PGE_312_Spring10_Solution_HW2 - PGE 312 Physical and...

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PGE 312 Problem 2-1 The state of the system is shown in Since both gas and liquid are presen diagram. Therefore, the pressure c the temperature of 150 o F. The vapor pressure of 2-methylpen Problem 2-5 Using the Cox’s Chart (Fig 2-7 McCa pressures up to the critical point, w From (80; 560) until (80; 800), the v the density of the ethane, passing f 800), there is no abrupt phase chan system will be vapor or gas (Tempe (100,560), no abrupt change in the crossed. The system will remain as 2 Physical and Chemical Behavior of Fluids Home Work 2 Solution n the figure below nt in the container the system is on the vapor pressu corresponds to the saturation (or vapor) pressure co ntane at 150 o F (from the chart on page57) is 20 psia ain), at different temperatures, determine the corre which is 90.1 F & 708.5 psi. vapor-pressure line is crossed. Therefore, there is a s form the vapor phase to the liquid phase. From (80; nge (Vapor pressure line is not crossed) but at the fin erature is greater than the critical temperature). From properties of ethane is noticed as the vapor pressur gas. ure line in the P-T orresponding to a . sponding vapor sharp change in 800) to (100; nal condition, the m (100,800) to re line is not

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By using the Pressure-Volume diagram, it is easy to identify and visualize how pressure-temperature changes take place when conditions of the system change and how these conditions determine the existence of a particular phase. Thus, passing for a condition where only the vapor phase is present to one where both liquid and vapor coexist is readily described by this kind of plot.
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