Question

Determine the molar volume of n-butane at 425 K and 38 bar by the generalized compressibility-factor correlation.

Answer #1

determine the molar volume of isobutane at 610K and 20 bar by
the generalized compressibility factor correlation

Calculate the volume for n-butane at 313.28℃ and 75.92 bar
according to:
1. The ideal gas equation
2. The theorem of corresponding states
3. Generalised correlation for the Compressibility factor
4. Generalised correlation for the Second virial coefﬁcient.

What is the molar volume of n-hexane at 660K and 91 bar
according to (a) the ideal gas law and (b) the van der Waals
equation? For the latter, first use the equations at the end of the
CHE346 class notes on van der Waals gases to determine values of
the constants a and b in the van der Waals equation from the
critical constants for n-hexane, Tc = 507.7 K and Pc = 30.3
bar.

n-butane vapor and liquid are in equilibrium (boiling) at 18.66
bars. Use the Peng Robinson EOS to determine the saturated liquid
and saturated vapor molar volumes. Also determine the saturated
liquid molar volume using the Rachett equation. In addition, use
the Pitzer correlation for the Virial EOS to estimate the saturated
vapor molar volume.

n-butane vapor and liquid are in equilibrium (boiling) at 18.66
bars. Use the Peng-Robinson equation of state to determine the
saturated liquid and saturated vapor molar volumes. Also determine
the saturated liquid molar volume using the Rachett equation. In
addition, use the Pitzer correlation for the Virial EOS to estimate
the saturated vapor molar volume.

Consider H2O at 16 bar and 498 K. Use (a) the ideal gas law, (b)
the generalized compressibility chart, and (c) the steam tables to
find specific volume. Assuming (c) is the measured value, how much
error is inherent in the calculations in (a) and (b)?

Calculate the fugacity and fugacity coefficient of n-butane in
the liquid state at 350 K and 60 bar

Calculate the pressure exerted by benzene for a molar volume of
2.4 L at 600. K using the Redlich-Kwong equation of state:
P=RTVm−b−aT√1Vm(Vm+b)=nRTV−nb−n2aT√1V(V+nb)
The Redlich-Kwong parameters a and b for benzene
are 452.0 bar dm6 mol−2 K1/2 and 0.08271 dm3 mol−1,
respectively.
Is the attractive or repulsive portion of the potential dominant
under these conditions?

1.
Find values of residual enthalpy for ethylene at 400 K and 25 bar
using Peng-Robinson equation of state.
2. Find values of residual Gibbs energy, enthalpy and entropy
for n-heptane at 500 K and 100 bar using Virial equation of
state.
3. Estimate the values of Compressibility factor, enthalpy and
entropy for Benzene and cyclohexane if it compressed from 650 K and
60 bar to 500 K and 110 bar.
4. Calculate ΔU and ΔH for 1 kg of...

A fuel gas consists of 75% butane (C4H10), 10% propane (C3H8)
and 15% butene (C4H8) by volume. It is to be fed to the combustion
chamber in 10% excess air at 25ºC, where it is completely burnt to
carbon dioxide and water. The flue gases produced are to be used to
generate 5 bar steam from water at 90ºC.
(a) Write balanced equations for the combustion of each
component of the fuel gas.
(b) Explain the need for excess air....

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