Amount Of Substance - Ideal Gases

Question 1

What is Avogadro’s Hypothesis on gases?

Answer 1

1 mole of any gas would fill the same volume of space

Question 2

Avogadro’s Hypothesis

What is the volume of space?

Answer 2

24,000cm*3

Question 3

Avogadro’s Hypothesis

When would this occur?

Answer 3

Measured at room temperature and pressure

Question 4

Avogadro’s Hypothesis

What is the molar gas volume?

Answer 4

The volume per mol of gas molecules

Question 5

Avogadro’s Hypothesis

What is the molar gas volume at room temperature and pressure?

Answer 5

Approximately 24 dm3 mol-1

Question 6

1 mol = 24,000 cm*3

What is 24,000 cm3 in dm3?

Answer 6

24 dm*3

Question 7

If 1 mol is 24 dm*3, what is

0.5 mol

2 mol

Answer 7

0.5 mol = 12 dm*3

2 mol = 48 dm*3

Question 8

What is the calculation triangle for
volume of gas (V)
Number of moles (n)
Molar gas volume (24)

Answer 8

V
——————
n | 24

Question 9

What does volume of gas =

Answer 9

Number of moles x molar gas volume

Question 10

What does number of moles =

Answer 10

Volume of gas / molar gas volume

Question 11

What does molar gas volume =

Answer 11

Volume of gas / number of moles

Question 12

What are the units for volume of gas?

Answer 12

dm*3

Question 13

What are the units for number of moles?

Answer 13

Mol

Question 14

What are the units for molar gas volume?

Answer 14

dm3 mol-1

Question 15

What is the ‘ideal’ behaviour of gasses?

5

Answer 15

Molecules act as though they are ridged spheres

Molecules are in constant motion

Molecules exert a constant pressure on the walls of their container

Collisions of molecules are completely elastic

As temp increases, kinetic energy of molecules increases

Question 16

What are the key assumptions we make of gases?

2

Answer 16

Any intermolecular forces between gas molecules is entirely negligible

Relative to the volume of their container, the volume occupied by the molecules themselves in negligible

Question 17

What is the ideal gas equation?

Words

Answer 17

Pressure x volume = number of moles x gas constant x temp

Question 18

What is the ideal gas equation?

Symbols

Answer 18

pV = nRT

Question 19

What is the unit for pressure?

Answer 19

Pa

Question 20

What is the unit for volume?

Answer 20

m*3

Question 21

What is the unit for number of moles?

Answer 21

Mol

Question 22

What is the unit for temperature?

Answer 22

K

Question 23

1kpa = ?pa

Answer 23

1,000

Question 24

1cm3 = ?m3

Answer 24

0.0001

Question 25

How do we change a °c into °Kelvin?

Answer 25

Add 273