Questions tagged [van-der-waals-behavior]
Questions with substantial discussion on the behavior of real gases using the van der Waals model (as opposed to just calculations with the van der Waals equation, or a casual reference to the van der Waals model).
11 questions with no upvoted or accepted answers
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Experimental Verification of Van der Waals parameters?
I am currently trying to find an academic paper that experimentally verifies the a and b values of Van der Waals forces for carbon dioxide. I can't seem to find this, and am wondering if I am missing ...
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About Real Gas and Ideal Gas - Select the correct statement(s):
Select the correct statement(s):
At Boyle's temperature a real gas behaves like an ideal gas at low pressure.
Above critical conditions, a real gas behaves like an ideal gas.
At high pressure van der ...
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Why is it experimentally difficult to accurately find the critical volume of a real gas?
I was reading up on the derivation of the values of various critical state functions( $\ce{Vc}$, $\ce{pc}$ and $\ce{Tc}$) from the Van der Waals equation (Physical Chemistry by G.W. Castellan). There, ...
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How does a dry shampoo work?
From my chemistry knowledge, I know that soaps are made from fatty acids and some sort of base and this reaction also gives us $\ce{H_2O}$ so the grease in hair dissolves and gets washed away in water....
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What’s the physical meaning of (∂v/∂T )P?
I'm solving this exersice:
The equation of state of a Van der Waals gas is
\begin{equation}
\left(P + \frac{a}{v^2}\right)(v-b) = RT
\tag{1}
\end{equation}
Where $a$,$b$ and $R$ are constants.
...
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Student Question regarding molecular van der Waals volume and Polarizability
I would like to request a crosscheck of my understandings regarding molecular van der Waals volume and polarizability. Please have a look through my statements about these 2 concepts below and point ...
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Why is Inversion Temperature not equal to Boyle's temperature?(Theoretically)
Mathematically, it is proven that the inversion temperature is twice that of Boyle's temperature.
But if a gas is not showing the Joule-Thompson effect, it is behaving ideally and it has no ...
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How should I evaluate $\left(\frac{\partial U}{\partial V}\right)_T$ with van der waals equation: $P = \frac{nRT}{V-nb}-a(\frac{n}{V})^2$?
So in my homework I was able to get this-
$\left(\frac{\partial U}{\partial V}\right)_T = T(\frac{\partial P}{\partial T})_V - P$
but now I'm trying to plug in $P = \frac{nRT}{V-nb}-a(\frac{n}{V})^2$ ...
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Are spontaneous/induced dipoles the same as van der Waals forces?
I am puzzled by the names of dipoles.
What is the difference among permanent dipoles, spontaneous dipoles, van der Waals forces, and intermolecular forces?
Does "The intermolecular force" ...
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When do repulsive forces in a gas actually become dominant?
We say that repulsive forces become dominant when Z>1
(i.e. Vobserved > Vtheoretical).
But when the difference between Vobserved and Vtheoretical is less than b, shouldn't attractive forces ...
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What is the value of isothermal compressibility of a van der Waals gas at critical point?
For a van der Waals gas, isothermal compressibility is $$\kappa=\frac{V^2(V-nb)^2}{nRTV^3-2an^2(V-nb)^2}$$ If one substitutes the values of critical temperature and volume in this formula, isothermal ...
