Why heat increases entropy | Energy and enzymes | Biology | Khan Academy

Why heat increases entropy even though some of it can do work!

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[joao_ssouza]

So, when heat is transferred to the gas it will eventually increase its temperature, this increases the number of possibilities that the atoms may spread out due to the higher temperature and the possible increase in volume (if the piston isn't stuck). That's why if we have a initial state S0 and we go to a state S1 with Q and T and to a state S2 with Q and T/2, S2 will have more entropy, since its temperature is smaller than that in S1 its volume will be bigger (the heat was partially used to do work) and so the entropy.

[shivameucci]

6:09 turn it on at half speed. I literally cried, it was so funny.

However, according to a traditional story, the term ‘entropy’ was suggested by John von Neumann to Shannon in the following terms: “You should call it entropy, for two reasons. In the first place your uncertainty function has been used in statistical mechanics under that name. In the second place, and more importantly, no one knows what entropy really is, so in a debate you will always have the advantage.” (Tribus and McIrving 1971, p. 180).

[wellnessworldshop]

So...energy losses energy more and more over time? Is that what you're trying to say?

[Dilophi]

Why does a hotter system with the same volume(and amount of particles) have more entropy than a cooler system?
Because entropy is not only about different states of position(in Space) but also about different state in TIME.
A hotter system has MORE different states in 1 hour than a cooler system with almost non moving particles.
Did i understand this correctly?

[garbagepailkids]

So eventually there will be almost no energy in the universe?

[aggffdgubfff]

OKay but what makes energy 'less useful'???

[timmmyers]

As you go back in time towards the big bang the universe heats up yet entropy decreases, how's that?