FINALS
CHE 111P
Name: _
1. An evaporation-crystallization process is used to obtain solid potassium sulphate from an
aqueous solution of this salt. Fresh feed to the process 18.6 wt% K2SO4. The wet filter cake
consists of solid K2SO4 crystals and a 40 wt%

1. A stream of humid air containing 1.00 mole% H2O(v) and the balance dry air is
to be humidified to a water content of 10.0 mole% H2O(v). For this purpose,
liquid water is evaporated into the air stream. Calculate, Moles of humid air
entering per moles o

DALTONS LAW OF PARTIAL PRESSURE
T and V are constant
Pressure fraction = mole fraction
PT = PA + PB + PC +.
AMAGATS LAW OF PARTIAL VOLUME
T and P are constant
Volume fraction = mole fraction
VT = VA + VB +VC +
GIVEN:
GAS MIXTURE
CH7
87%
C2H6
12%
C3

MATERIAL BALANCE
Processing of raw materials into useful and
profitable products
- products are use both as consumer
goods and as intermediates for further
chemical and physical modification to yield
consumer products
Chemical engineers should be critica

MATERIAL BALANCE
INVOLVING MULTIPLE
UNITS
FLOWCHART is a graphical representation
of a process
USES:
1)
2)
3)
4)
Formulate material and energy balances.
Troubleshooting
Control of operation conditions
Optimization of process
Indicates equipment sequence a

Course
Code:
Course
Title:
CHE111P
CHEMICAL ENGINEERING
CALCULATIONS 1
Course
This is a course that introduces the students to units and dimensions of measures
Description: of physical and chemical properties of materials commonly encountered in
chemical

Name:_
CHEMISTRY 1211
Spring 2007
EXAM #2 Version 1
This exam is 9 pages long. Please read through all of the questions first and ask about
anything you do not understand. You will have one hour and 15 minutes to complete this
exam. Exams will be picked u

Names: _
CHE111P
Sec: _
Worksheet 9:_
Energy Balance
Instructions. Write the item/s (word/s or phrase or value/s) to answer the question or to complete
the sentence or to satisfy the instruction for each number. For numbers that will require solutions,
wr

Name:
1. A stream of humid air containing 10.0 mole% H2O(v) and the balance dry air is
to be dehumidified to a water content of 1.0 mole% H2O(v). For this purpose,
the feed was cooled and pressure was increased. Calculate, Moles of humid air
entering per

ENERGY BALANCE
For non-reactive process
DEFINITION
System anything in the universe under
consideration
Types of system
Open system exchange of mass and energy (for continuous
process)
Closed system exchange of energy only (for batch process)
Isolated syst

KINEMATICS
Kinematics is the study of how things move.
Kinematics (from Greek , kinein, to move) is the branch of classical mechanics
that describes the motion of objects without consideration of the causes
leading to the motion
Linear Motion :
Linear or

System
anything in the
universe under consideration
Types of system
Open system exchange of mass and
energy (for continuous process)
Closed system exchange of energy only
(for batch process)
Isolated system no exchange of mass nor
energy
Energy poss

UNITS / CONVERSION
Systme international d'units)
is the modern form of the metric system
SI units is important in your expression of physical
and chemical measurements.
Understanding and proper expression of quantities
are basic skills for any modern educ

FUNDAMENTALS OF
MATERIAL BALANCES
FUNDAMENTALS OF MATERIAL BALANCES
Basis Law of Conservation of mass
GENERAL BALANCE EQUATION
INPUT + GENERATION - OUTPUT - CONSUMPTION
= ACCUMULATION
Input: enters through the systems boundaries
Generation: produced withi

MATERIAL BALANCE
INVOLVING MULTIPLE
UNITS
FLOWCHART is a graphical representation
of a process
USES:
1)
2)
3)
4)
Formulate material and energy balances.
Troubleshooting
Control of operation conditions
Optimization of process
Indicates equipment sequence a

MATERIAL BALANCE
MATERIAL BALANCE FUNDAMENTALS
Based on the fundamental
Conservation of Mass
Law of
Chemical engineers are concerned with doing
mass balances around chemical processes.
Doing mass balance is similar in principle to
accounting.
We must l

Names: _
CHE111P
Sec: _
Worksheet 2:_
Process Variables
Questions
1. Complete the table
Process
Variable
System
International (SI)
American Engineering
System (AES)
Density
Flow rate
Mole
Molecular weight
Temperature
Pressure
2. Complete the table
A lique

Names: _
CHE111P
Sec: _
Worksheet 3:_
Process Variables
Questions
1. Identification
_ 1. Unit operation which involves concentrating a solution by
removing part of the liquid.
_ 2. Process whereby mixtures of liquids are subjected to repeated
partial vapo

Names: _
CHE111P
Sec: _
Worksheet 1:_
Units and Dimension
Questions
1. Use the dimensional analysis (unit conversion, factor label) problem-solving
method to answer the following questions.
a. How many 5.00-peso coins would you get for a two hundred bill?

DIMENSIONS AND UNITS
CHAPTER 1
CONVERSIONS AND
APPLICATIONS
DIMENSION
Quantity that can be measured
UNITS
Its how you express dimension
SYSTEMS OF MEASUREMENT
A set of units which can be used to
specify anything which can be
measured and were historical

Names: _
CHE111P
Sec: _
Worksheet 4:_
Material Balance (Single Unit)
Questions
1. 100 kg of vinegar with strength of 4.63% wt acetic acid (HC 2H3O2) is to be
diluted to produce vinegar with strength of 4.00 % wt acetic acid.
a) Draw the process flowchart

1. Moist air at 30 oC and 1 atm with a dew point of 15 oC is humidified using
water at 20 oC. The moist air leaves the humidifier at 25 oC and is
saturated. Calculate, Moles of moist air leaving the humidifier per mole
of moist air entering the unit.
Mois

Names: _
Sec: _
CHE111P
Worksheet: _
Multi Unit
1. In the production of bean oil, beans containing 10 wt % oil and 90 % solids
are ground and fed to a stirred tank, where they are suspended in liquid nhexane. The feed ratio is 3 kg hexane / kg beans. Esse

1. Units, Dimension and Process Variables
a) A concentration C (mol/L) varies with time (min) according to the equation
-2.00t
C = 3.00 e
What are the units of 3.00 and 2.00
or 2.00 min-1
2.00 /min
3.00 mol/L
b) Convert 50.0 lb/in2 to kg/m2
lb
2
50.0
= 50

Names: _
CHE111P
Sec: _
Worksheet 9:_
Energy Balance
1. a) Reported specific heat of water is 4.184 J /(g)( oC). Using Table A.3, Calculate the
average specific heat of water from 0 oC to 100 oC. Calculate the % error.
5
2
6
18.2964+0.47212 T 133.88 x 1 0

1. One thousand cubic meters of air saturated with water vapor at 30C and 99.0 kPa is
cooled to 14C and compressed to 133 kPa. How many kilograms of H2O condense
out?
E, saturated air-water vapor
1000 m3
30 oC, 99 kPa
L
14 oC, 133 kPa
Cooler/Condenser
W
R

Names: _
CHE111P
Sec: _
Worksheet :_
Gas-Vapor Mixture
Problems
1. The partial pressure of water vapor in an air at 30 oC and 1 atm is 20
mmHg. The vapor pressure of water at 30oC is 31.38 mmHg. Calculate
a. The molal humidity is
Pp
( P T Pp)
Hm =
=
20
(7

1. Units, Dimension and Process Variables
a) The density of a certain liquid is given an equation of the following form:
Cp
A BTe
where = density in g/cm3, t = temperature in C, and P = pressure in atm.
The equation is dimensionally consistent. What are t