S1.5.1 and S1.5.2 Ideal gases and deviation from ideal gas behaviour

[@davidc1490]

An important point is that all gases deviate to some extent from ideal gas behavior - so, an ideal gas is a theoretical thing. This video very nicely highlights where that deviation is greatest, that is where PV=nRT is going to be farthest from giving the correct answer.

[@sawerakhan3279]

Well explained 👍

[@Susiew-j4i]

this saved my homework ❤

[@gothman1818]

You have really helped me Thank you

[@greatsonzimunhu8504]

Thanks .May God bless you

[@SarahKhan-sv4fc]

This video helped me alot🫶

[@kxmo5086]

this is very helpful, thank you so much!

[@MSJChem]

Glad I could help.

[@tusharramdin3969]

How does the number of mol change in a closed system?

[@MSJChem]

In relation to what ?

[@Mks_0005]

it does not. When PV/RT increases or decreases that doesn't mean that the amount of gas is changing, it just means that the pressure (for example) is higher or lower for a real gas than what was predicted by the ideal gas equation so it changes the whole fraction. If it was an ideal gas that ratio of PV/RT would always be equal to one because there are no outside factors (such as volume of particles or intermolecular forces) like in real gases

[@MSJChem]

Correct - if no gas is added to or released from the container then n (amount in mol) will be constant.