
Concept explainers
Perform the same computation as in Sec. 8.1, but for ethyl alcohol

The modal volume using Ideal gas law and Van der waals equation for ethyl alcohol
Ideal Gas equation states,
Here,
Van der waals equation states,
Here,
Answer to Problem 1P
Solution:
Using van der waals equation the modal volume
Van der waals equation is more appropriate to calculate the modal volume.
Explanation of Solution
Given Information: For ethyl alcohol
Consider Van der waals equation,
Therefore, the modal volume
Hence, differentiating,
Therefore, for ethyl alcohol
Construct a MATLAB code “Code_97924_8_1P_a.m” to perform the mentioned iteration.
function
for
if
end
end
while (
if
end
end
The output of the function is,
Therefore, using van der waals equation the modal volume of the ethyl alcohol at
Using Ideal gas equation the modal volume,
Therefore, for ethyl alcohol at
Therefore, using Ideal gas equation the modal volume of the ethyl alcohol at
Interpretation:
As Ethyl alcohol is not an ideal gas hence Ideal gas equation is not appropriate to calculate the modal volume so the van deer waals equation should be imposed to calculate the modal volume.
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Chapter 8 Solutions
Numerical Methods for Engineers
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