ideal gas equation

Question 1

unit of pressure (P)

Answer 1

Pa

Question 2

unit of volume (V)

Answer 2

m3

Question 3

unit of temperature (T)

Answer 3

K

Question 4

unit of number of moles (n)

Answer 4

mol/moles

Question 5

converting temperature

Answer 5

C –> K add 273

Question 6

using a gas syringe

Answer 6

• note down temperature and pressure of the room as volume of gas depends on pressure and temperature and pressure of the room
• used in experiments where volume of gas is measured
• moles of gas can be calculated from gas volume (and temperature and pressure) using ideal gas equation
• make sure you don’t leave gaps in your diagrams where gas could escape
• if drawing gas syringe, make sure you draw it with some measurement markings on the barrel to show measurements can be made

Question 7

potential errors in using a gas syringe

Answer 7

• gas escapes before bung inserted
• syringe sticks
• some gases like carbon dioxide or sulfur dioxide are soluble in water so the true amount of gas is not measured