Key idea
Gas laws
PV = nRT
Gas laws connect pressure, volume, temperature and amount of substance. The ideal-gas equation PV = nRT is a powerful model whose accuracy depends on conditions.
Gas laws
The key idea
Gas laws connect pressure, volume, temperature and amount of substance. The ideal-gas equation PV = nRT is a powerful model whose accuracy depends on conditions.
Why it matters
Real gases approach ideal behaviour most closely when intermolecular effects and molecular volume are relatively unimportant.
A picture to remember
Key idea
Gas laws
Guided example
Gas laws
Gas laws connect pressure, volume, temperature and amount of substance. The ideal-gas equation PV = nRT is a powerful model whose accuracy depends on conditions.
Put it into practice
Gas laws
Choose a concrete case linked to Gas laws. Write down the known information, what you are trying to find, and the units. Then state the rule, model or trend you will use. If a calculation is involved, keep the units visible at every line; if it is conceptual, state what changes and what remains fixed.
Check your answer
A strong answer contains four things: the starting situation, the variable that changes, the direction or numerical result, and one check. The check can be a unit, an order of magnitude, a limiting case or a comparison with a familiar example.