Laws of Thermodynamics

Zeroth Law of Thermodynamics “If two thermodynamic systems are each in thermal equilibrium with a third, then they are in thermal equilibrium with each other.” A 60° F C B

First Law of Thermodynamics “The total amount of energy in an isolated system is conserved.” Energy moves from place to place Energy changes from one form to another Energy cannot be created or destroyed

First Law of Thermodynamics “The total amount of energy in an isolated system is conserved.”

First Law of Thermodynamics “The total amount of energy in an isolated system is conserved.”

Second Law of Thermodynamics “The entropy of the universe tends to a maximum.” Heat moves from warmer to cooler Air moves from higher pressure to lower pressure Moisture moves from wetter to drier

Second Law of Thermodynamics “The entropy of the universe tends to a maximum.”

Second Law of Thermodynamics “The entropy of the universe tends to a maximum.”

Second Law of Thermodynamics “The entropy of the universe tends to a maximum.” Does the ice cool the drink, or does the drink warm the ice?

Second Law of Thermodynamics “The entropy of the universe tends to a maximum.” Why does our coffee get cold by itself, but it never gets hot by itself?

Third Law of Thermodynamics “As the temperature of a system approaches absolute zero (−273.15°C, 0 K), then the value of the entropy approaches a minimum.”