# Ideal gases Flashcards Preview

## Physics ALevel OCR > Ideal gases > Flashcards

Flashcards in Ideal gases Deck (9)
1
Q

What is a molar mass

A

The mass of one mole of a substance

2
Q

Equation to find the number of atoms of molecules in a substance

A

(Number of moles in substance) X Avogadros constant

n X NA

3
Q

A

6.02 X 10^23

4
Q

Assumptions made for kinetic theory of matter for an ideal gas

A

1-has contains large numbers of atoms or molecules moving in random directions at random speeds
2-atoms/molecules occupy negligible volume compared to volume of gas
3-atoms/molecules collide perfectly elastically with each other and the container
4-time during collisions is negligible compared to time between collisions
5-electrostatic forces of the atoms/molecules are negligible except for during collisions

5
Q

Boules law

A

Pressure is inversely proportional to the volume provided the temperature and mass remain constant

6
Q

Pressure law

A

Pressure is directly proportional to temperature provided the volume and mass remain constant

7
Q

Charles’s law

A

Volume is directly proportional to the temperature provided pressure and mass remain constant

8
Q

Ideal gas equation

A
```PV=nRT
P-pressure
V-volume
T-absolute temperature
n-number if moles of gas
R-molar has constant```
9
Q

What is the value and meaning of R

A

R is the molar has constant

8.31 JK^-1mol^-1