2.3- THE IDEAL GAS EQUATION

Question 1

Is the volume of a given mass of any gas fixed?

Answer 1

no

Question 2

How does the volume of a given mass of any gas change?

Answer 2

changes with pressure and temperature

Question 3

What is Boyle’s law?

Answer 3

product of pressure and volume is constant as long as temperature remains constant

Question 4

What is the equation for Boyle’s law?

Answer 4

pressure P * volume V = constant

Question 5

What is Charles’ law?

Answer 5

volume is proportion to temperature as long as pressure remains constant

Question 6

What are the equation for Charles’ law?

Answer 6

volume V ∝ temperature T

volume V
————- = constant
temperature T

Question 7

What is the Gay-Lussac’s law also called?

Answer 7

constant volume law

Question 8

What is Gay-Lussac’s law?

Answer 8

pressure proportional to temperature as long as volume remains constant

Question 9

What are the equations for Gay-Lussac’s law?

Answer 9

pressure P ∝ volume V

pressure P
—————- = constant
temperature T

Question 10

What is the two combined equations for Gay-Lussac’s law?

Answer 10

 temperature T  = constant for fixed mass of gas

Question 11

What is the ideal gas equation?

Answer 11

pressure (Pa) * volume (m3) = no. of moles * gas constant (JK-1mol-1) * temp (K)

PV=nRT

Question 12

What is the value of R in the ideal gas equation?

Answer 12

8.31 JK-1mol-1

Question 13

Do gases obey the ideal gas equation exactly?

Answer 13

no

Question 14

When do gases obey the ideal gas equation pretty well?

Answer 14

at room temperature and pressure

Question 15

What is the volume of a mole of any gas at room temperature and pressure approximately?

Answer 15

2400cm3 (24dm3)