ChE 502 Spring 2016 HW Assignment 7 Solution
1. Find the standard enthalpy of reaction for the formation of trichloroethylene from
ethylene and chlorine.
C2 H 4 g 2Cl 2 g C2 HCl3 l H 2 g HClg
r
H 298
H
i
f ,i
298
Pr oducts
H
i
f ,i
298
Re ac tan ts
r
H
ChE 502 Spring 2017 HW Assignment 5 Solution
1. Liquid ethanol at 10 oC enters a heat exchanger. It leaves as a vapor at 150 oC. Find the
required heat in kJ/kg.
Take a basis of one kg of ethanol.
Ref: EtOH(l) at 10oC and 1 atm.
in
m kg
EtOH(l)
EtOH(v)
k
ChE 502 Spring 2017 HW Assignment 1 Solution
1. Liquid n-pentane is pumped through a 2.50-in ID pipe at a rate of 20.0 gal/min.
Calculate the rate at which kinetic energy is transported by the fluid.
From Table B.1, the density of n pentane is 630 kg/m3.
ChE 502 Spring 2017 HW Assignment 6 Solution
1. Air at 55 oC with a dew point temperature of 12 oC is fed to a wood-chip dryer. In the
dryer, the air is adiabatically humidified to 80% relative humidity before it leaves the
dryer. The dryer removes 2.5 kg
ChE 502 Spring 2017 HW Assignment 5
1. Liquid ethanol at 10 oC enters a heat exchanger. It leaves as a vapor at 150 oC. Find the
required heat in kJ/kg.
2. A stream of liquid benzene at 10 oC enters a heat exchanger at a rate of 125 kg/min
where it is eva
ChE 502 Spring 2017 HW Assignment 6
1. Air at 55 oC with a dew point temperature of 12 oC is fed to a wood-chip dryer. In the
dryer, the air is adiabatically humidified to 80% relative humidity before it leaves the
dryer. The dryer removes 2.5 kg of water
Case Study Assignment 3
Construct a flow diagram based on the following process description.
The reform reaction takes place in a bank of tubes enclosed in a firebox. Methane enters the
process at a rate of 1.75 mol/s at 25 oC and 10.0 bar. It is mixed wi
ChE 502 Spring 2017 HW Assignment 4
1. Nitrogen flowing at a rate of 100 mol/min is heated from 100 oC to 700 oC in a heat
exchanger. Find the heat required in kJ/kg using Table B.8. Repeat using the formulas in
Table B.2. State any assumptions.
2. Nitrog
ChE 502 Spring 2016 Practice Exam 3 Solution
1. Methane is reacted with steam to form carbon monoxide and hydrogen (as H2). A side
reaction between methane and water produces carbon dioxide and hydrogen. The feed to
the reactor contains methane and steam
ChE 502 Spring 2016 HW Assignment 2 Solution
1. Steam is released from a boiler through a valve. The steam in the boiler is at 260 oC
and 5.00 bar and may be considered stationary. It exits the nozzle at 240 oC and 4.00 bar.
The nozzle is adiabatic and ha
ChE 502 Spring 2016 HW Assignment 8 Solution
1. Methanol is burned with 15 % excess air. Find the adiabatic flame temperature.
The combustion stoichiometry is
3
CH 3OH l O2 g CO2 g 2 H 2 Ol
2
The enthalpy of combustion is -727 kJ/mol.
Take a basis of one
ChE 502 Spring 2016 HW Assignment 9 Solution
1. Dry air is bubbled through liquid methyl ethyl ketone and emerges with a relative
saturation of 20.0 % at 70.0 oC and 1.00 atm. The mixture enters a burner at a rate of 2.50
m3/min where all of the limiting
ChE 502 Spring 2017 HW Assignment 4 Solution
1. Nitrogen flowing at a rate of 100 mol/min is heated from 100 oC to 700 oC in a heat
exchanger. Find the heat required in kJ/kg using Table B.8. Repeat using the formulas in
Table B.2. State any assumptions.