Introduction of Entropy

[@TutorialsPoint_]

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[@shkelqimfuga6773]

For causing an expansion in an ideal piston-cylinder system, we add heat to the system. As a consequence our system will produce a certain amount of work. This is work done by our system. To compress air in the cylinder a certain amount of work must me done on the system, therefore thermal energy will be released by the system (1st law of thermodynamics). What you were saying is that the temperature decreases in the system during expansion. Ofcourse I am talking about a non-adiabatic system. If we talk about an adiabatic system and we let the gas expand, this expansion must be compensated by a decrease in temperature (see adiabatic process with decrease in pressure). How I understand entropy is: Entropy tells us something about the quality of energy. An increase in entropy is a decrease in the quality of the energy. Energy of the highest quality is work as it can (almost) totally be converted to heat. The reverse isn't the same as converting heat to work must be done with heat engines. If a system generates a big amount of entropy, it actually means that the thermal efficiency of the system is quite low and produces a lot of waste energy. If the generated entropy of the system equals to zero, we have an efficiency of an ideal heat engine (which is quite difficult to achieve because of the irreversibilities). In this case the expansion did useful work. The energy that is used to do this work cannot be used anymore, hence an increase in entropy. Correct me if I'm wrong. It's quite confusing without mentioning these important things. Thank you!

[@saketg5954]

I think, when one says, "entropy is the amount of disorder in the system", I think one has to add, "on an atomic scale", otherwise it will be misleading because a glass of water looks more ordered than a bunch randomly shaped ice in the same glass, but we know the glass of water has higher entropy.

[@Sharmasahil389]

Sir your way of teaching is quite good. Keep it up. Your efforts help us to understand topic in depth👍

[@guffygaming1758]

#Mechanicaltutor

[@bhavanip1623]

sir please say what is an entropy

[@4ernomore1]

Simply it is "the hidden energy of the fluid"

[@loki_ben]

@@kvsalahuddin5 thank u sir..ur definition is perfect..🙂

[@HariprasadPVenu]

There was a small misunderstanding by the way... entropy(disorder / randomness ) increases with increase in entropy...moreover his explanation based on pressure and volume was valid....

[@nituyadav363]

Can you tell me please your property diagram process is feasible or not?

[@poojajaglan5306]

kzbin.info/www/bejne/l4nOqGWOp8uVqJY👍

[@m.s.arivalan4489]

Thanks for your video I understood sir Can u brief introduction of enthalpy How to tell heat and pressure combined as enthalpy?

[@Entertainment-ui9ze]

U confused me how temp is inversely proportional to entropy???

[@irfanullah-ig3wm]

Same case bro How it is?

[@DeeEm2K]

Gibbs Energy equation states that

[@piyushkumarpandey1]

From second law of thermodynamics state that S=klogw.you can find out your answer.

[@m.s.arivalan4489]

Because deals with second law of thermodynamics sink to source

[@austinfox4130]

Because (Delta S)=Q/T, therefore S is proportional to 1/T where Q is the proportionality constant.

[@sushmitraj9276]

HELPED A LOT

[@vinodengineer5694]

🙏🙏🙏🙏

[@scitech8087]

no one can teach like pradeep sir

[@mileslegend]

Amazing

[@priyabratadash381]

Temperature determines the direction of a thermodynamic process.

[@neelima8236]

Very well explained..... helped a lot.. thanks sir

[@madhusmitamoharana1113]

Be clear about ur concept

[@yakooprajmuthalibu2578]

Index of unavailability degerataion of energy is called as entropy

[@madhusmitamoharana1113]

Rectification - entropy is directly propertional to temperature

[@mikijena2499]

wrong thought

[@nithinpaul271]

I think If we supply high temprature then we get high amount of work Due to that less heat flow would be avilable at sink(T2) due to that entalpy per unit mass would be would be less So we have high entropy at high temperature

[@kabirkhanal4319]

❤🙏🙏

[@prayagpraveen8856]

You are Awesome sir... understanding the Concept Very very very nicely... Thank you so much ❤️❤️❤️❤️❤️❤️❤️❤️

[@shivasmart967]

tq sir

[@asifhusain3425]

Sir can you explain the basic concept of heat and temp how i differentiate them as i think temp is an unit that measures the hotness or coldness of a body and heat is form of energy that contains volume (nos of molecules) at specific temperature (ex 100°c) as we increase the volume(nos of molecules) at same temperature (100°c) is that mean we increase the heat ?????? Plz clear me anyone

[@bhavishyapandey4809]

You are great

[@shahji1988]

only Pradeep Sir can teach it

[@Shrististatus]

Plz pradeep sir come to teach entropy

[@navyasree831]

Supper teaching sir tq

[@davidgowtham5750]

V.gowtham Mech B Lateral entry

[@humairjahangir8749]

overall your lectures are good... but this comprehension has some flaws in it. being a lecturer of physics i can tell you what are those problems. if you will ask me then.

[@phcseetanapalliphc2072]

Thank u for lessoned me sir

[@qUB3r-001]

great work

[@zaeemshahzad9427]

While going from s2 to s1 entropy doesn't decrease. it always increase

[@diegotomas3278]

the entropy of a system can decrease, its the entropy of the whole universe the one that will always increase.

[@balachbaloch3520]

way entropy increase less while temperature is higyh

[@irfanullah-ig3wm]

How u say that sir That if temp falls from T1 to T2 and Volume will decrease. If u change pressure And temperature also less so if temp less how entopy becomes greater plz explain?

[@ahmedhanafy7636]

same question here lol

[@irfanullah-ig3wm]

Ahmad bhai 👍👍

[@bethasrikanth7813]

sir, maintain clear videos, without seeing how can we understand'

[@romilpatel8620]

Video is clear but you are not watching in good quality....

[@studyabroadexpertsbhagalpu6898]

S=Kb loge(n). [Entropy].

[@ghazalaumer2127]

Thanks Your a big help

[@Tarsem1336]

thanks sir

[@rajakarthikeyantheking7786]

Rajakarthikeyan Mech B Later entry