Ideal Gas Law
Physics: Cambridge International A Level, topic 9.2.3
Ideal Gas Law
The ideal gas law is a good model for the behaviours of large amounts of gas.
Ideal gas law
- The ideal gas law can be written as:
- Pressure x volume = number of moles x ideal gas constant x temperature
- pV=nRT
- Where R is the ideal gas constant and has a value of 8.31
- This equation can be rearranged to solve for any of the terms.
Boltzmann constant
- Ideal gas constant x number of moles = Boltzmann constant x number of molecules
Avogadro's number
- This equation gives the relationship between the ideal gas constant, the Boltzmann constant and Avogadro's number (the number of molecules in a mole):
- Using the ideal gas law and the above equation, we can now write:
Test yourself on Ideal Gas Law
Which form of the ideal gas law is correct?
What is the correct equation for the Boltzmann constant?