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The laws of thermodynamics are as follows:
0th law: Transitive Law. If A is in thermodynamic equlibrium with B (A=B), and B is in thermodynamic equlibrium with C (B=C), then A is also in thermodynamic equilibrium with C (A=C). Basically, this means, if A and B have the same temperature, and B and C have the same temperature, A and C have the same temperature.
1st Law: Energy Conservation. In a closed system, Energy is conerved. or U=Q + W. The energy of the system is equal to the heat of the system plus the work done on/by the system. (U= total internal energy, Q = heat, W = work)
2nd Law: Entropy always increases or stays the same. For any spontaneous process, the associated Entropy change is always positive. For a quasistatic process (if I move things infinitesimally slowly), the entropy change may be zero.
3rd Law: Temperature approaches absolute zero assumptotically. You can never reach absolute zero, and you can never have a true quasistatic process. Thus, entropy always increases, and at some point, heat will be so evenly distributed across the universe, that there will be no spatial gradient to the heat, thus no more usable energy (heat death of the universe).
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And if you say to me tomorrow, oh what fun it all would be.
Then what's to stop us, pretty baby. But What Is And What Should Never Be.
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