Homework 1
Materials & Energy Balances
Due Monday April 5 12 midnight 492
Rhodes.
Problems from Felder and Rousseau
Chapter 2 page 31 (17 problems and a program)
2.1, 2.2, 2.7, 2.8, 2.19, 2.22-2.26
2.31, 2.32, 2.33, 2.36, 2.37
Write a computer program using Igor Pro to do a least squares fit of a
set of x-y data with error in y values.
Use this program to do problems 2.40 and 2.45 (using error of 1 where
you don't know the error).
The linked values were measured for small angle
scattering of
x-rays, Intensity (cm-1) versus scattering vector q (Å-1)
(reduced
angle
of
scattering). The size of the objects that
scattered can be obtained from Guinier's law I(q) = G exp(-(qRg)2/3).
The
standard deviation for intensity can be estimated as the square
root of the intensity. Linearize Guinier's Law and propogate the
error
to the linearized term for intensity. Do a linear regression to
obtain G and Rg and propogate the errors from I to your
answers for the linear regression. Give values and error for G
and Rg from this data set.
Please turn in your answers and a printout of your computer program
code.
I will be around on Friday and Monday if you have problems
(You can use the Chemical Engineering or Materials Engineering Student
Lounge to work on the problems
Chemical is on 6'th floor between Baldwin and Rhodes and Materials is
on the 5'th floor of Rhodes.)