P-V Diagrams Flashcards
1
Q
What would happen to volume if a gas is expanding
A
It increases
2
Q
What happens to volume of a gas is being compressed
A
Decreases
3
Q
How do you find the work done by a gas using a P-V diagram
A
The area under the graph = pressure x change in volume
4
Q
Explain the otto cycle
A
1- gas is compressesd
2- the gas then combusted causing high pressure
3- gas expands and does work (adiabatic process - doesn’t lose heat energy) (isothermal - work done at constant temperature)
4- exhaust valve opens and leftover heat is rejected
5
Q
What is an isotherm
A
Curved lines of constant pressure
6
Q
What are adiabats
A
Curved lines of constant pressure
Steeper than isotherms
