Page 384 - Chemical engineering design

˛
Coefficient of thermal expansion
ˇ 358 Relative volatility CHEMICAL ENGINEERING q 1
Liquid activity coefficient
1 Activity coefficient at infinite dilution
T
Dynamic viscosity ML 1 1
T
b Viscosity at boiling point ML 1 1
1 1
m Viscosity of a mixture ML T
Density ML 3
L Liquid density ML 3
v Vapour (gas) density ML 3
b Density at normal boiling point ML 3
Surface tension MT 2
m Surface tension of a mixture MT 2
Fugacity coefficient
s Fugacity coefficient of pure component
L Fugacity coefficient of pure liquid
V Fugacity coefficient of pure vapour
Suffixes
a, b
i, j, k Components
1, 2
L Liquid
V Vapour

8.19. PROBLEMS

8.1. Estimate the liquid density at their boiling points for the following:
1. 2-butanol,
2. Methyl chloride,
3. Methyl ethyl ketone,
4. Aniline,
5. Nitrobenzene.
8.2. Estimate the density of the following gases at the conditions given:

Ž
1. Hydrogen at 20 bara and 230 C,
Ž
Ž
2. Ammonia at 1 bara and 50 C and at 100 bara and 300 C,
Ž
3. Nitrobenzene at 20 bara and 230 C,
Ž
4. Water at 100 bara and 500 C. Check your answer using steam tables,
Ž
5. Benzene at 2 barg and 250 C,
Ž
6. Synthesis gas (N 2 C 3H 2 )at5barg and25 C.
8.3. Make a rough estimate of the viscosity of 2-butanol and aniline at their boiling
points, using the modified Arrhenius equation. Compare your values with those
given using the equation for viscosity in Appendix C.
8.4. Make a rough estimate of the thermal conductivity of n-butane both as a liquid
Ž
Ž
at 20 C and as a gas at 5 bara and 200 C. Take the viscosity of the gaseous
2
n-butane as 0.012 mN m s.
Ž
8.5. Estimate the specific heat capacity of liquid 1,4 pentadiene and aniline at 20 C.