Questions tagged [equation-of-state]
Questions related to a thermodynamic equation describing the state of matter under a given set of physical conditions.
7
questions with no upvoted or accepted answers
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0answers
250 views
Calculating phase diagram of mixed component natural gases (Bubble and Dew points)
I'm developing a piece of software which calculates and plots the Phase diagram (PT) for a mixed component natural gas.
For reference I have a common used natural gas plotted using a commercial ...
2
votes
0answers
78 views
Calculating the number of energy states in a particular momentum direction
Given is a 2D scenario of a particle within a container:
The circumference shows all the possible 2D spatial directions for a given momentum value of the particle. One of those momentum directions is ...
2
votes
0answers
99 views
understanding redox reaction
I am a total noob in chemistry, so sorry in advance if this is a very stupid question... I am trying to solve this redox reaction:
$$\ce{KClO3 + FeSO4 + H2SO4 -> Fe2(SO4)3 + KCl}$$
$$\ce{K^{+1}Cl^{...
1
vote
0answers
10k views
dU/dV in van der Waals equation of state derivation
Previous, I proved that
$$\frac{T_2}{T_1}^{C_V/(C_p-C_V)}=\frac{V_1}{V_2}$$
I've been asked to derive a similar expression for a gas that obeys the equation of state
$$p=\frac{RT}{(\overline{V}-b)}$...
0
votes
0answers
107 views
Is a/b > 1 mol/L for a and b in the van der Waals equation?
We know that the van der Waals equation for real gases is
$$\left(p + \frac{an^2}{V^2}\right)(V-nb) = nRT.$$
Is $a > b$ always in this equation?
In my textbook $a > b$ for gases like $\ce{He},$ $...
0
votes
0answers
24 views
At what pressure is the triple point of ethane?
Depending on source there are two givens for the triple point of ethane: 0.8 Pa or 1.1 Pa. Only one of them can be correct, which one is?
-1
votes
1answer
58 views
How to determine if pressure surpasses capacity with the van der Waals equation of state?
I have to decide whether a $\pu{20 L}$ container with $\pu{0.8 kg}$ ethane can withstand the pressure at $\pu{373.15 K}$. The following information is given:
\begin{align}
b &= \pu{6.448x10^-2 ...