PAG 8.1 Estimating a value for Absolute Zero

Question 1

What safety precautions should be taken when working with mercury?

Answer 1

Safety goggles must be worn throughout and any spillage must be reported to a teacher
Mercury spillage kit should be available

Question 2

Describe the relationship between pressure and temperature at a constant volume

Answer 2

Pressure and absolute temperature are directly proportional when volume is constant

Question 3

Describe the relationship between temperature and volume at constant pressure

Answer 3

Volume and temperature are directly proportional when pressure is constant.

Question 4

Describe the particles of a substance when it is at absolute zero

Answer 4

particles have no kinetic energy and so are completely stationary

Question 5

What is the theoretical volume of an ideal gas at absolute zero

Answer 5

0

Question 6

What is the theoretical pressure of an ideal gas when at absolute zero

Answer 6

0

Question 7

What is the accepted value for absolute zero in degrees Celcius?

Answer 7

-273.15

Question 8

How can you obtain a value for absolute zero from a graph of length of air column against temperature?

Answer 8

x intercept

Question 9

How can you obtain a value for absolute zero from a pressure against temperature graph?

Answer 9

X - intercept

Question 10

How can the x - intercept of a graph be calculated from a line of best fit?

Answer 10

X intercept given by -c/m in
y = mx + c

Question 11

What is the difference between absolute pressure and gauge pressure?

Answer 11

Absolute pressure uses absolute zero as a base point whereas gauge pressure uses atmopheric pressure as its base point

Question 12

How can atmospheric pressure be accounted for in your data?

Answer 12

Atmospheric pressure subtracted from gauge pressure readings to give you absolute pressure readings

Question 13

What is the value of atmospheric pressure at sea level?

Answer 13

101kPa