Thank you so much for this excellent video. The way you related the little bits of knowledge together adds meaning to the topic and it is, therefore, easier to understand and remember
you prolly dont care but does anybody know a method to log back into an Instagram account? I was stupid lost the password. I would love any help you can give me!
@Jagger Javion i really appreciate your reply. I got to the site through google and im waiting for the hacking stuff atm. I see it takes a while so I will reply here later when my account password hopefully is recovered.
00:05 Entropy is a measure of disorder and thermal energy. 01:41 Entropy of an isolated system always increases. 03:14 Cyclic integration of Delta Q over T is always less than or equal to zero. 05:18 Clausius Inequality: Reversible processes have Delta Q/T equal to zero. 06:44 Entropy is a new state variable discovered by Clausius. 08:37 Definition of entropy change in a reversible process 10:25 Entropy change in isothermal heat transfer process 11:46 Entropy change during constant pressure process
Great video, i learnt a lot. I believe however you switched the impossible and irreversible equations around. It was written in my textbook (Moran's principles of thermodynamics) and I checked google as well to be sure.
There is only one saturation temperature for each pressure. So if you know it is at a certain pressure and you know it is either 1) sat liq 2) mixture or 3) sat vapor - then you know it is at the saturation temp associated with that pressure.
@@engineeringdeciphered Is it not possible for it to vaporize completely and become superheated vapor? Thus increasing the temperature without changing pressure?
U said entropy is a measure of thermal energy that is not available to be converted to work. Does it mean entropy is energy but useless. Not the transferable one like the heat that is transferred from higher temperature to lower temperature? Lower the entropy change higher the efficiency of the engine? Is it true because entropy of the universe is increasing the entire energy of the universe should become useless one day. Is it true because entropy is also a measure of multiplicity so entropy determines the direction. Is it true because entropy is also a measure of disorder so because the highest disorder is more probable proves entropy is always increasing.
Is the cyclic integral of dQ/T entropy? Apparently not because of the Clausius inequality being < 0 for irreversible. Why this cyclic integral not delta s? Thank u Increase in entropy of an irreversible cycle is always > 0. Could u please clarify, because the Clausius inequality is not intuitive at the least at first look.
I think you either mean the entropy of the universe is always increasing for a process to happen or entropy generation is always more than or equal to zero. But the cyclic integral of heat (Q) over temperature (T) is actually just the negative sum of the cycle entropy generation. If you remove the negative sign, it will be more than zero (irreversibilities present).
I know this comment is kind of old but one that I've been reading that's been pretty good so far before the semester starts is Yunus Cengel's Thermodynamics: An Engineering Approach, the 8th edition, I'm sure you can find a free PDF of it online somewhere
And from my understanding so far, I could be wrong on this, but a lot of these equations in thermodynamics are empirical in nature, since thermodynamics itself is entirely empirical; they're derived from experimental data over the years
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you're honestly saving my life!. I can't express how helpful this video is. THANK YOU!!!!!!!!
I would have loved to see the rest of the tutorials on thermodynamics from chapter 9 to 12
What textbook is that?
@@MinimalBen I believe it is the 5th edition of Thermodynamics: An Engineering Approach.. by Cengel and Boles.
Thank you so much for this excellent video. The way you related the little bits of knowledge together adds meaning to the topic and it is, therefore, easier to understand and remember
you prolly dont care but does anybody know a method to log back into an Instagram account?
I was stupid lost the password. I would love any help you can give me!
@Kayden Richard Instablaster ;)
@Jagger Javion i really appreciate your reply. I got to the site through google and im waiting for the hacking stuff atm.
I see it takes a while so I will reply here later when my account password hopefully is recovered.
@Jagger Javion it worked and I actually got access to my account again. I'm so happy:D
Thanks so much you saved my ass!
@Kayden Richard Glad I could help xD
thanks for the help. just realized three days before the final that my prof sucks. this is a life saver.
00:05 Entropy is a measure of disorder and thermal energy.
01:41 Entropy of an isolated system always increases.
03:14 Cyclic integration of Delta Q over T is always less than or equal to zero.
05:18 Clausius Inequality: Reversible processes have Delta Q/T equal to zero.
06:44 Entropy is a new state variable discovered by Clausius.
08:37 Definition of entropy change in a reversible process
10:25 Entropy change in isothermal heat transfer process
11:46 Entropy change during constant pressure process
Excellent explanation.
Great video, i learnt a lot. I believe however you switched the impossible and irreversible equations around. It was written in my textbook (Moran's principles of thermodynamics) and I checked google as well to be sure.
Yep i was wondering this too
thank you so much!
Wonderfull explanation.
Dear Teacher, I want to study rest of the chapters but I cannot do it. Can you make videos of the rest of the lessons?
7:00 thus it is an exact differential in the reversible case
Thank you so much this has been such a huge help
Such a dumb question but I cannot remember why does const pressure = const temp? thank you for your videos
There is only one saturation temperature for each pressure. So if you know it is at a certain pressure and you know it is either 1) sat liq 2) mixture or 3) sat vapor - then you know it is at the saturation temp associated with that pressure.
@@engineeringdeciphered Is it not possible for it to vaporize completely and become superheated vapor? Thus increasing the temperature without changing pressure?
U said entropy is a measure of thermal energy that is not available to be converted to work.
Does it mean entropy is energy but useless.
Not the transferable one like the heat that is transferred from higher temperature to lower temperature?
Lower the entropy change higher the efficiency of the engine?
Is it true because entropy of the universe is increasing the entire energy of the universe should become useless one day.
Is it true because entropy is also a measure of multiplicity so entropy determines the direction.
Is it true because entropy is also a measure of disorder so because the highest disorder is more probable proves entropy is always increasing.
Haha, you still have some studying to do.
The way to spell "cyclic" makes me shiver...although the video is good
10:00
What is internally reversible path?
Is it isothermal, adiabatic, constant pressure, constant volumes, isentropic?
Thanks alot, very helpful and clearly explained!
Is the cyclic integral of dQ/T entropy?
Apparently not because of the Clausius inequality being < 0 for irreversible.
Why this cyclic integral not delta s?
Thank u
Increase in entropy of an irreversible cycle is always > 0.
Could u please clarify, because the Clausius inequality is not intuitive at the least at first look.
Entropy generation makes the process irreversible?
Only extremely slow processes have no entropy generation and irreversible?
htas off sir for explaining a tough topic
noooo why dont you have chaps 9 to 12 T.T
6:45 explaining the effect delQ/t integral has....
if entropy is always increasing, how is entropy neg for irreversible process? (in equation dQ/T
I think you either mean the entropy of the universe is always increasing for a process to happen or entropy generation is always more than or equal to zero. But the cyclic integral of heat (Q) over temperature (T) is actually just the negative sum of the cycle entropy generation. If you remove the negative sign, it will be more than zero (irreversibilities present).
Great man....can you tell me how above equation comes from?....and can you recommend me a good book on thermodynamics....
I know this comment is kind of old but one that I've been reading that's been pretty good so far before the semester starts is Yunus Cengel's Thermodynamics: An Engineering Approach, the 8th edition, I'm sure you can find a free PDF of it online somewhere
And from my understanding so far, I could be wrong on this, but a lot of these equations in thermodynamics are empirical in nature, since thermodynamics itself is entirely empirical; they're derived from experimental data over the years