Chemical and Biological Engineering 311
Homework 5
Spring 2013
March 6th
Problem 1. A mixture containing 45.1 mol% propane, 18.3 mol% isobutane, and 36.6 mol% n-butane is
ashed in a drum at 367 K and 2.41 Mpa. Estimate the mole fraction of the original m

Chemical and Biological Engineering 311
Homework 4
Spring 2016
Due February 18
Problem 1. For the acetonitrile (1), nitromethane (2) system:
2945.47
2972.64
ln P2sat(kPa) = 14.2043
T (C) + 224
T(C) + 209
You may assume that Raoults law applies.
ln P sat(

Chemical and Biological Engineering 311
Homework 3
Spring 2016
Due February 11
Problem 1. Calculate the enthalpy and entropy of saturated butane at 360 K given the
following information
1.The compressibility factor (Z) data for isobutene are:
P(bar)
0

Chemical and Biological Engineering 311
Homework 2
Spring 2013
Due Feb 6th A;-
Problem 1. A gas is compresSed isothermally (T=500°C) from 1 bar to 70 bar. The equation of state for
the gas was determined empirically and is noted below.
RT a cmébar
=- a=1.

Chemical and Biological Engineering 311
Homework 1
Spring 2016
Due January 28
Problem 1. An ideal gas undergoes a reversible, polytropic expansion in which the
expression pVn = C holds. C and n are constants, n>1.
a) calculate the work for such an expansi

1. At the beginning of the compression process of an air standard Otto cycle, p 1 = 1 bar, T 1 = 290
K, V 1 = 400 cm3. The maximum temperature in the cycle is 2200 K and the compression ratio
is 8. Determine (a) the heat addition, in kJ. (b) the net work,

Chemical and Biological Engineering 311
Homework 1
Fall 2016
Due September 15
Problem 1. (save this one for last; well cover what you need on Tuesday!)
a) Show that
=
b) Use the following data to determine the change in entropy when liquid H2O at 1 bar

Chemical and Biological Engineering 311
Homework 3
Fall 2016
Due September 29
Problem 1. Calculate the enthalpy and entropy of saturated butane at 360 K given the
following information
1.The compressibility factor (Z) data for isobutene are:
P(bar)
0
0.1

Chemical and Biological Engineering 311
Homework 2
Fall 2016
Due September 22
Problem 1
a) Show that = + [ ( ) ] .
b) For a gas whose EOS is P(V-b) = RT, with constant b, how does the result in part
a) simplify?
c) A cylinder contains 2 moles of a gas at

Chemical and Biological Engineering 311
Homework 2
Spring 2016
Due February 4
Problem 1: Use PREOS.xls to find VL, VV, ZL and ZV for pentane at 373 K and 0.5915
MPa. Show that ZL and ZV are roots for the analytical (cubic) form of the Peng Robinson
EOS (E