Chapt 5 Gaseous State

Question 1

Boyle’s law. What formulas to use when mass/moles and temperature are constant? (Think about the 2 other measures of gases)

Answer 1

pressure is inversely proportional to volume
- When pressure rises, volume of gas decreases
So p/V is a constant 1/k
_
p1/V1 = p2/V2

Question 2

Charles’ Law. What formula to use when pressure and mass/moles of a gas is the same? (Think of balloon in hot/cold water)

Answer 2

Volume is directly proportional to temperature
- When temp, increases, volume of gas rises
- V/T is constant k
_
V1/T1 = V2/T2

Question 3

How to convert Celsius to Kelvins

Answer 3

0C = 0+273 K

Question 4

How to convert 1 bar to Pa

Answer 4

1 bar =100 000 Pa (10⁵)

Question 5

How to convert 1 atm to Pa?

Answer 5

1 atm = 1 x 101325 Pa

Question 6

How to convert 1dm³ to m³

Answer 6

1dm³
= 10³ cm³
= 10^-6 m³

Question 7

5 Assumptions of the ideal gas but 2 are more impt than the rest

Answer 7

1 and 2 most impt!!
1. The volume of the gas molecule is negligible compared to the volume of the container
_______________ _______________

2. There are no intermolecular forces between molecules of an ideal gas
   __
3. The collision of the gas molecules are perfectly elastic
   _________Less Impt
4. Gas particles are in constant rapid and random motion
   __
5. The average kinetic energy of a particle is directly proportional to its absolute temperature measured in Kelvins

Question 8

What is the ideal gas equation

Answer 8

V = R (nT)/p
_______________ _______________
- V is vol in m3
- R=8.31
- n is moles
- T is temp in K
- p is pressure in Pa

Question 9

How to calculate Mr from ideal gas eqn?

Answer 9

V = R (nT)/p

V = (mRT)/pM

Question 10

2 conditions for the most ideal gas

Answer 10

1.Low pressure
- At low pressure, gas particles are further apart the volume of the gas particles are less significant compared to the volume of the container
_______________

2. High temp
   - At higher temperatures, particles have more kinetic energy