All Questions
Tagged with equilibrium energy
48
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Thermodynamic work and potential functions
I was reading about the maximum thermodynamic work of a system (Z) that is going to equilibrium.
\begin{equation}
dZ = dU + p_0 + T_0dS
\end{equation}
I then came across the thermodynamic potential ...
- 31
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2
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90
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What is the difference between a reversible process and an equilibrium? [closed]
I am confused about the differences between a reversible process and an equilibrium when considering their energy aspect.
Here is what I know so far.
(1) Equilibrium and Reversibility
Equilibrium ...
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3
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3
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138
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Why equation 5.29 in Schroeder's Thermal Physics is not equal to 0?
In Schroeder's "An Introduction to Thermal Physics" in section 5.2 (page 161), Schroeder considers the case of a system that is in thermal contact with a reservoir that is at a constant ...
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Does a single ball undergoing ideal simple harmonic motion count as being in thermodynamic equilibrium?
(Posting this and deleting a previous similar post to make the question more clear.)
Suppose we have an isolated system inside a box consisting of a spring and a ball attached to the spring. The ball ...
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6
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Empirical equivalence of shifted chemical potential $\mu_i$
It is often said that, in classical thermodynamics, entropy $S$ and energy $U$ are defined only up to an additive constant proportional to the total amount of substance $N=\sum_i N_i$ (where the sum ...
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What happens to entropy and energy when you inject heat into 2 systems in thermal equilibrium?
Below we have a system A and B in thermal equilibrium. What happens to the entropy and energy of the systems when you inject heat into system A and let it equilibriate further? I know that heat will ...
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3
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Is the pressure zero in thermal equilibrium? [duplicate]
In a canonical ensemble, we have $dU=TdS-pdV$. When we are in equilibrium, the energy $U$ is minimized. This implies that $\left(\frac{dU}{dV}\right)_S=0$. Since $\left(\frac{dU}{dV}\right)_S=-p$, we ...
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How does a particle in a medium return to its original position in case of sound propagation?
I know that particles don't go from one end to the other, they just vibrate and transfer sound energy to next particle. How do they return to equilibrium again? Do they return just after collision ...
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2
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503
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Helmholtz energy and thermal equilibrium
After asking this question, I am still confused about some facts regarding Helmholtz energy and thermal equilibrium.
Based on my understanding so far, for a system in contact with surroundings which ...
- 203
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3
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577
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How a thermodynamical system relaxes to equilibrium?
For a system in contact with a reservoir with well-defined constant temperature $T$, its change in Helmholtz energy satisfies the following inequality:
$$\Delta F \le -W_{by}$$
where $W_{by}$ denotes ...
- 203
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How does a body know where it has min/max energy?
So today I was learning about equilibrium and I got to know that a body moves away from an unstable equilibrium because its potential energy at the unstable equilibrium is high. For example, in a ...
- 111
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Find the speed of the particle when it has covered a displacement of magnitude $L$ [closed]
This is my first question on this site.
A particle of mass $m$ is constrained to move along $x-\textrm{axis}$. The only force acting on the particle is given by $$F=F_0\cos\left(2\pi\frac{x}{\lambda}\...
- 101
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2
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67
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Isolation vs the Minimum Energy Principle
The Second Law of Thermodynamics says, that in equilibrium the Entropy S of an isolated system is maximized.
The First Law of Thermodynamics says that an isolated system has fixed internal energy U. ...
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338
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What exactly is minimized when we say that the Gibbs Free Energy of Reaction is minimized at equilibrium?
I often see the statement- "gibbs free energy of a reaction is minimized at equilibrium"
The reasoning given is that $ \Delta_rG<0$ before equilibrium and $ \Delta_r G=0$ at equilibrium. ...
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A gas immersed in a higher-pressure gas: spherical shape?
I'm considering a bubble of gas of some arbitrary shape immersed in another gas of higher pressure. There is no gravity (and hence no buoyancy), the gases are ideal (so there are no attractive forces ...
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