Part 1 Flashcards
Define work
Is the mechanical energy in transit
Define Heat
Thermal energy in transit
Zeroth Law of thermodynamics
If A and B are in thermal equilibrium and B is in thermal equilibrium with C
Then C is in thermal equilibrium with A regardless of material
What is Zeroth law so important
It allows us to have a temperature scale
Define thermodynamic system
A quantity of matter of fixed identity which we can draw a boundary around
Define an open system
A system that allows the transfer of mass, momentum and energy
Give examples of an open system
Room or temperature
Define a closed system
A system that allows the transfer of energy but not mass and momentum
Give examples of a closed system
Earth, perfectly closed flask
Define an isolated system
A system that does t allow transfer of energy, momentum or mass
Give an example of an isolated system
The universe
Define Functions of states
Macroscopic variables that define the state of a system unaffected by size
Examples of functions of state
Pressure, volume, temperature internal energy
Define equations of states
The relations between functions of state I thermal equilibrium
Define internal energy
The average energy of all internal degrees of freedom in a thermodynamic system
