Help on absolute zero?

Question

The concept of using extrapolation to zero volume as a means of determining absolute zero has a flaw. Which of the following do you most suspect of being the flaw?

a) Volume-temperature graphs are not straight lines
b) The volume of a substance at absolute zero will not be zero
c) You can't get enough data point before the gas liquefies.
d) At very high temperatures, the gas forms a plasma.

As you do the experiments with pressure (p) and temperature (T), you are expecting the graphs to be straight lines with pressure increasing when temperature increases. What is the meaning of the point where the straight line crosses the y-axis?

a) absolute zero
b) boiling point
c) melting point
d) pressure at boiling point
e) pressure at 0°C

Note: for the second question, the y-axis is for pressure and x-axis for temperature.

Answer 1

For the first question, b) seems most correct to me. The volume of a substance will never go to zero, regardless of temperature.

For the second question, the answer depends on whether pressure or temperature is on the y-axis. You didn't specify.

Answer 2

a, e
the ideal gas law is called what it is because the ideal graph is a straight line. It isn't a straight line in reality, so it is hard to extrapolate.
the first question cannot be b because although there is no such thing as zero volume, there is no such thing as absolute zero temperature. Absolute zero is just the most probable temp when volume approaches zero.
Temp is the x-axis so when the line passes the y-axis, the x is 0 so the point is pressure at 0 degrees.

Answer 3

1. b.

2. I am not doing any experiments. You should do your lab work.

Answer 4

b
e