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Phase chapter 3

# Phase chapter 3 - PETE 2032 Homework Solutions Chapter 3...

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PETE 2032 Homework Solutions Chapter 3 3.1. Calculate the molar volume of an ideal gas at 100 psia and 90 o F. ( 29 mole lb ft psia F R mole lb ft psia p RT V RT pV o o o M M - = + - = = = 3 3 0 . 59 . 100 460 90 . . 732 . 10 3.3. Compute the composition in weight fraction and the composition in volume fraction of a gas with the following composition. Component Composition, Mole fraction Methane 0.870 Ethane 0.049 Propane 0.036 i-Butane 0.025 n-Butane 0.020 1.000 Solution Component Composition, Mole fraction Z j Mole Wt. M j Z j M j a j j M M z Wt. frac. z j Vol. frac Methane 0.870 16.04 13.95 0.711 0.870 Ethane 0.049 30.07 1.47 0.075 0.049 Propane 0.036 44.10 1.59 .0081 0.036 i-Butane 0.025 58.12 1.45 0.074 0.025 n-Butane 0.020 58.12 1.16 0.059 0.020 1.000 M a = 19.62 1.000 1.000 3.5. An ideal gas exerts 100 psig in a cylinder at 100 o F. What will the pressure be if the temperature is reduced to 32 o F? For n 1 = n 2 ( 29 ( 29 ( 29 psia F F psig T T p p T p T p V V T V p T V p o o 8 . 100 460 100 460 32 7 . 14 100 1 2 1 2 2 2 1 1 2 1 2 2 2 1 1 1 = + + + = = = = = 1

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PETE 2032 Homework Solutions Chapter 3 3.8. A 20 ft 3 tank at 100 o F is pressured to 200 psia with a pure paraffin gas. Ten pounds of ethane are added, and the specific gravity of the gas mixture is measured to be 1.68. Assume that the gases act as ideal gases. What was the gas originally in the tank?
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Phase chapter 3 - PETE 2032 Homework Solutions Chapter 3...

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