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Show me the second law of thermodynamics and example to apply it.

The second law of thermodynamics
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Sure
lets discuss abt it

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Other answers:

http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/seclaw.html this explains wht it is and also provides examples to explain the concept
@RANE, I wanna discuss it here :D cmooon
I've read that @RANE
ya but she wants the explanation. I have many llinks like that ...
LOOOL I give up if you just link me of that lul @goformit100
ok lets start... yu begin first.
btw i just wnna make this subject ALIVE :D
@goformit100 Carnot?
ok
ya do you know 2nd law is defined in about 10 ways by different scientists
nah, tell me 10 :3
suppose Im your student :D
ok
All the spontaneous process are irreversible in nature.
-_-
Why thermodynamics on chem section, not in phys section?
0_0 Open your eyes baby
lol i have small eyes (aka squinty)
That can only be answered by Miss @Preetha
woka woka. im afraid now.
In chemistry, this is where entropy is usually introduced.....
@joemc . you mean like carnot?
Oh I see.
The first law introduces internal energy, U. Second law introduces entropy, S
Entropy of the universe always keeps on increasing
Carnot is brought in here, at least the Carnot efficiency.
Congratss for 50 SS. :3 I give you amed for it :)) you're awesome ★░░░░░░░░░░░████░░░░░░░░░░░░░░░░░░░░★ ★░░░░░░░░░███░██░░░░░░░░░░░░░░░░░░░░★ ★░░░░░░░░░██░░░█░░░░░░░░░░░░░░░░░░░░★ ★░░░░░░░░░██░░░██░░░░░░░░░░░░░░░░░░░★ ★░░░░░░░░░░██░░░███░░░░░░░░░░░░░░░░░★ ★░░░░░░░░░░░██░░░░██░░░░░░░░░░░░░░░░★ ★░░░░░░░░░░░██░░░░░███░░░░░░░░░░░░░░★ ★░░░░░░░░░░░░██░░░░░░██░░░░░░░░░░░░░★ ★░░░░░░░███████░░░░░░░██░░░░░░░░░░░░★ ★░░░░█████░░░░░░░░░░░░░░███░██░░░░░░★ ★░░░██░░░░░████░░░░░░░░░░██████░░░░░★ ★░░░██░░████░░███░░░░░░░░░░░░░██░░░░★ ★░░░██░░░░░░░░███░░░░░░░░░░░░░██░░░░★ ★░░░░██████████░███░░░░░░░░░░░██░░░░★ ★░░░░██░░░░░░░░████░░░░░░░░░░░██░░░░★ ★░░░░███████████░░██░░░░░░░░░░██░░░░★ ★░░░░░░██░░░░░░░████░░░░░██████░░░░░★ ★░░░░░░██████████░██░░░░███░██░░░░░░★ ★░░░░░░░░░██░░░░░████░███░░░░░░░░░░░★ ★░░░░░░░░░█████████████░░░░░░░░░░░░░★ ★░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░★ @joemc BACK TO CHEM
But, a second law problem in chemisty could be something like.... Calculate the entropy change when Neon, at 25 C and 1.00 atm in a 500ml container i allowed to expand to 1 L and is simutaneously heated to 100 C
@Machida you care so much of others. you are so kind to the good ones.
@joemc . wait, whats for exactly that law? chem or phys first? Ya, I dont think abt it before. :o
@goformit100 because caring each other for intelligence is awesome :)
You would calculate the entropy of the system at each temperature and then calculate the difference.... Equation to follow....
wow, im too stupid of that :/
At constant pressure: \[S(T_F) = S(T_i) + \int\limits_{i}^{f} (\frac{ C_P }{ T })dT\] At constant volume: \[S(T_F) = S(T_i) + \int\limits\limits_{i}^{f} (\frac{ C_V }{ T })dT\]
So, you need to break the problem down into two steps and figure the difference of each change. One part is isothermal, the other adiabatic.
What types of problems are you looking for...the Gibbs function also is part of this and probably more approachable.
Well, let me do it tomorrow. i need to understanding that materials again. :D btw thanks a lot for make me thought abt it
OK, good night!
Good noon :D
I always like to give the following image of the 2. law: Consider a ball (our system) bouncing of the floor (the surroundings). The ball does not rise as high after each bounce because there are inelastic losses in the materials of the ball and floor. The kinetic energy of the ball’s overall motion is spread out into the energy of thermal motion of its particles and those of the floor that it hits. The direction of spontaneous change is towards a state in which the ball is at rest with all its energy dispersed as the disorderly thermal motion of molecules in the air and spread over the atoms of the virtually infinite floor. So what are we trying to say: We look for the direction of change that leads to the random dispersal of the total energy of the isolated system. Leading to our understanding of the second law of thermodynamics: The entropy of an isolated system increases in the course of a spontaneous change: ∆S_total > 0

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