- #1

badatstuff

- 3

- 0

1) A measure of the tendency to disperse heat: eg maxwells relations (dS/sU)_[v constant] = 1/T says if you increase the energy of a system while T is low, it has more of an affect on entropy than if you increased the energy by the same amount on a system with high T.

If you place two systems S_1 and S_2 in contact with each other with temperatures T_1 > T_2 then eventually it reaches equilibrium. But the 1/T relation means the entropy of the colder body increases faster than loss of entropy of the warmer body?

2) Entropy is a measure of "disorder" eg a typical examples given in textbooks - someone unbiased of the final outcome stacking of books on a book shelf in completely random orientations, the odds of them being all in alphabetically in order is low due to the number of states. Entropy is a measure of the number of states. You can reduce the number of states by giving the book stacker more information, telling him he can stack them upright reducing the number of permutations and reducing entropy. In terms of system of particles more energy is more accessible states and so higher entropy?

I'm struggling to see the similarities between having a lack of information and seeing a colder body and wanting give it heat/feel the need to ruin its "order" too and make it disordered.

Thanks for your time