• Absolute 0
  • Lowest possible
  • Turns into plasma
• Law 0
  • If 2 are in equilibrium with another 3rd, the 2 apart are in equilibrium
  • ![[law 0 thermo.png]]
• Law 1
  • No heat destroyed
  • flows from one system to another
  • Loss == Gain
  • Heat added = increase in internal energy + external work
• Law 2
  • Heat never flows from cold to hot
  • Always goes from hot to cold
• Heat Engine
  • Converts heat into work
  • Efficiency =
    • $$Efficiency = \frac{T_{hot}-T_{cold}}{T_{hot}}$$
• Entropy
  • Order to disorder == entropy
  • disorganized energy can be changed with organizaional effort