PHYS261- Final Review Experiment 9
Questions with Correct Answers
Experiment 9 Purpose - ANSWERSExamine the relationship between the pressure,
volume and
temperature of air in a closed chamber. To do this, you will test the Ideal Gas Law when
the
temperature is held constant (Boyle's Law) and when the volume is held constant
(Charles' Law).
You will also do an experiment to find Absolute Zero, the temperature at which the
pressure of
an ideal gas would be zero.
Suppose there are 100 cm^3 of nitrogen at a temperature of 0 degrees Celsius and a
pressure of 1 bar =1.500x10^5 Pa. How many moles of nitrogen are there? -
ANSWERSPV=nRT
R=8.31 if Pa and m^3
R=0.082 if atm and L
Answer: n=0.0066
Consider the Boyle's Law Apparatus. Suppose that the volume of the gas is 25 cc and
the pressure is 30 lbs/in^2. If the plunger is depressed so that the volume is decreased
to 10 cc, what will the pressure be? - ANSWERSP1V1=P2V2
Answer: 75 lbs/in^2
What is room temperature on the Celsius temperature scale, approximately? -
ANSWERST=20 degrees C
How precisely can you measure temperature in the Charles law apparatus? How
precisely can you measure the pressure? - ANSWERS
Explain how you can use the Charles' Law apparatus to determine the absolute zero
temperature. - ANSWERSPlotting temperature vs pressure yields a linear line. The y
intercept of the line would be the slope multiplied by absolute zero.
Without using a thermometer, how can you establish a temperature of 100 °C? -
ANSWERSBoil water
What does "absolute zero temperature" mean? - ANSWERSThe temperature at which
the pressure of an ideal gas would be zero (0 Kelvins)
Questions with Correct Answers
Experiment 9 Purpose - ANSWERSExamine the relationship between the pressure,
volume and
temperature of air in a closed chamber. To do this, you will test the Ideal Gas Law when
the
temperature is held constant (Boyle's Law) and when the volume is held constant
(Charles' Law).
You will also do an experiment to find Absolute Zero, the temperature at which the
pressure of
an ideal gas would be zero.
Suppose there are 100 cm^3 of nitrogen at a temperature of 0 degrees Celsius and a
pressure of 1 bar =1.500x10^5 Pa. How many moles of nitrogen are there? -
ANSWERSPV=nRT
R=8.31 if Pa and m^3
R=0.082 if atm and L
Answer: n=0.0066
Consider the Boyle's Law Apparatus. Suppose that the volume of the gas is 25 cc and
the pressure is 30 lbs/in^2. If the plunger is depressed so that the volume is decreased
to 10 cc, what will the pressure be? - ANSWERSP1V1=P2V2
Answer: 75 lbs/in^2
What is room temperature on the Celsius temperature scale, approximately? -
ANSWERST=20 degrees C
How precisely can you measure temperature in the Charles law apparatus? How
precisely can you measure the pressure? - ANSWERS
Explain how you can use the Charles' Law apparatus to determine the absolute zero
temperature. - ANSWERSPlotting temperature vs pressure yields a linear line. The y
intercept of the line would be the slope multiplied by absolute zero.
Without using a thermometer, how can you establish a temperature of 100 °C? -
ANSWERSBoil water
What does "absolute zero temperature" mean? - ANSWERSThe temperature at which
the pressure of an ideal gas would be zero (0 Kelvins)
