Thanks for all the replies.
Well, when entropy increases, the disorder increases in the sense that we do not KNOW the current (or final) arrangement. If we do not KNOW the current / final arrangement, it's impossible for us to revert the system back to the initial order. Thus entropy can...
I'm speaking from an extremely logical point of view. Is it then, justified to take a principle to be true without any justification?
Entropy is definitely derived from the second law itself, so logically it should be ruled out if you are seeking a justification of the law itself.
But there must be some theoretical arguments in favour of the law. There must be some justification. If you don't know it, maybe someone else will answer.
Is it impossible to construct a PPM (of second kind) because of any reasons other than technological reasons like dissipation, friction and other losses? What I mean is, is there any internal loss? If so, how and why is that form of energy not recoverable into work?
I think experimental validation of laws are limited to only laws that are positive statements. If the law is stating an impossibility, there is no guarantee of the experimental validation, is there? One can always argue that it is not possible till now, which from a pure logical point of view...
Hello there. New here.
I have read and tried to understand the Kelvin Plank statement of the second law.
Essentially, it would imply, it is impossible to convert a given quantity of heat completely to work.
Why is it so? I mean, what is the justification for this?
I am ready to...