Thermodynamics

Describe the state of the system and tell of certain properties 

• U = internal energy
• T = temperature
• P = pressure
• V = volume
• H = enthalpy
• S = entropy
• G = free energy

All of these values can be reversed in the opposite direction beacuse path doesn't matter. I.e. fwdH= -fwdH 

Depend on the pathway taken to achieve a specific state

• 1. Work
• 2. Heat

i.e. energy transfer  

The smaller the volume, the greater pressure molecules are able to exert on the walls of the container because they are limited to movement in a smaller region 

Constant temperature - i.e. the heat going in is the heat coming out

deltaU = 1

q = W 

Completely isolated from the world 

No heat transfer

U = w

Constant volume - no work done 

U = q

Constant pressure 

U = q+w