HW_5_solution - PGE 312 Physical and Chemical Behavior of...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
PGE 312 – Physical and Chemical Behavior of Petroleum Fluids I Homework 5, Spring 2008 Problem 3-2 Pressure (P) = 14.7psia Temperature(T) = 100 o F = 560 o R Density ( ρ ) = 0.103 lb/ft3 R = 10.73 psia-ft 3 /lbmol- o R The general formula for this compound is C n H 2n Therefore, the molecular weight of the compound is: M = 12n + 2n = 14n (1) Applying the ideal gas law, m PV nRT RT M == × Therefore, mR MR T PV P T ρ = Applying the values of ρ , R, T and P, 0.103 10.73 560 42.102 14.7 M ×× from equation (1) M = 14n = 42.102 Therefore, n = 3.0 From the general formula for this compound ,C n H 2n , The compound is C 3 H 6 Æ Propene.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Problem 3-4 Component y i MW y i *MWi MWi*yi/ MWi*yi Methane 0.6904 16.043 11.076 0.303 Ethane 0.0864 30.070 2.598 0.071 Propane 0.0534 44.097 2.355 0.064 i-Butane 0.0115 58.123 0.668 0.018 n-Butane 0.0233 58.123 1.354 0.037 i-Pentane 0.0093 72.150 0.671 0.018 n-Pentane 0.0085 72.150 0.613 0.017 Hexanes 0.0173 86.177 1.491 0.041 Heptanes plus 0.0999 158.000 15.784 0.431 1.0000 36.611 1.000 In order to calculate the weight fraction, multiply the molecular weight by the mole fraction. And then divide the result by the total apparent molecular weight. This is the composition of the gas expressed in weight fraction. To obtain the composition of the gas in volume fraction of the gas, assume that the gas mixture behaves as an ideal gas. Therefore, according to Amagat’s Law of Partial Volumes and using the result from j jj j RT n Vn P y RT n P = == , the volume fraction of the gas mixture is simply the mole fraction.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 9

HW_5_solution - PGE 312 Physical and Chemical Behavior of...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online