Midterm 1 solutions
1. (3 points) It is possible to calculate the absolute entropy of a pure substance (T/F).
_T_ - See the Third Law the absolute entropy is zero for all perfect crystalline
substance
Chemical Engineering 141
Spring 2014
Homework 4
Due Friday March 7th
Please turn in your solution to each problem on separate sheets of paper. Write your name
on all sheets. Show all work
Problem 1
Ve
Chemical Engineering 141
Spring 2014
Due Friday, April 4th
Homework 7
Please turn in your solution to each problem separately. Write your name on all sheets. Show all
work.
Problem 1
Assuming the vali
Chemical Engineering 141
Spring 2014
Homework 3
Due Friday February 21st
Please turn in your solution to each problem on separate sheets of paper. Write your name
on all sheets. Show all work
Problem
Chemical Engineering 141
Spring 2014
Homework 8
Due Friday, April 18th
Please turn in your solution to each problem separately. Write your name on all sheets. Show all
work.
Problem 1
Ten (10) kmol hr
Chemical Engineering 141
Spring 2014
Homework 6
Due Friday, March 21st
Please turn in your solution to each problem separately. Write your name on all sheets. Show all
work.
Problem 1
A furnace fails
Chemical Engineering 141 Spring 2014
Homework 1
Due Friday, February 7
Please turn in your solution to each problem on separate sheets of paper. Show all work.
Problem 1
A closed system contains an id
Chemical Engineering 141
Spring 2014
Due Friday, May 2nd
Homework 10
Please turn in your solution to each problem separately. Write your name on all sheets. Show all
work.
Problem 1
A system initially
Chemical Engineering 141 Spring 2014
Homework 2
Due Friday, February 14
Please turn in your solution to each problem (except problem 1 and 2) on separate sheets of
paper. Please put problem 1 and 2 to
Chemical Engineering 141
Spring 2014
Homework 11
Practice Assignment
This assignment is for individual practice and will not be graded.
Problem 1
In chemical-reaction engineering special measures of p
HW#1#SOLN#
#
Example#problem#5#Matlab#code:#
#
%HW1 EA3 Spring 2015
%Spring-damper system; find the spring vs displacement plot
%
clear;
k1=4/3;
k2=0.5;
b1=0.25;
b2=1;
%
% loop over force from -6N to
2.26
Fifty kmol per hour of air is compressed from P1 = 1.2 bar to P2 = 6.0 bar in a steady-flow
compressor. Delivered mechanical power is 98.8 kW. Temperatures and velocities are:
T1 = 300 K
u1 = 10
Name:
SID:
Chemical Engineering 141: Thermodynamics
Spring 2014
Monday, April 7th, 2014
Midterm 1 50 minutes 100 points total
Turn in equation sheet with exam
Part I: Concept Questions
1. (1 point) Fo
Problem 2
Operating data are taken on an air turbine. For a particular run, P 1 = 8 bar, T1 = 600 K, and P2 =
1.2 bar. However, the recorded outlet temperature is only partially legible; it could be T
Problem 1
Problem 2
Problem 4
Looking up values for A, B, C, D for O2, CO2, H2O, and N2 gives
n
O2 (3)
CO2 (4)
H20 (5)
N2 (6)
A
1.025
1.05
2
11.618
nA
B
3.639 3.729975
5.457 5.72985
3.47
6.94
3.28 38.
Problem 1
A small adiabatic air compressor is used to pump air into a 20-m3 insulated tank. The tank
initially contains air at 25C and 101.33 kPa, exactly the conditions at which air enters the
compre