AP Physics 2 / Unit 9: Thermodynamics
9.2 The Ideal Gas Law
Notes
$$PV=nRT=Nk_BT$$
- Use kelvins. At constant $T$: $\displaystyle P\propto\frac{1}{V}$. At constant $V$: $P\propto T$.
- PV diagrams show gas processes.
Practice
A gas at constant volume is heated from 300 K to 600 K. Pressure:
$P\propto T$.
At constant temperature, halving volume makes pressure:
Boyle's law.
0 °C in kelvins:
Add 273.
Ready for more? Take the Unit 9 test.