absolute zero amazonaws com
ABSOLUTE ZERO Ever since scientists learned that temperature is a measure of the kinetic energy of atoms (how fast they are moving) they have pondered the possibility of stopping all molecular motion. This temperature, 0o on the Kelvin scale, would represent the lowest possible temperature. You will be using the absolute zero apparatus to predict this point on the Celsius scale and to learn some basic rules about gases. Write out the six steps of the scientific method Write out your three problem statements Write one page of research about the following: absolute zero, Charles Law, Boyle’s Law, gas, air pressure, PSI, boiling point, freezing point, state change, temperature, Bose-Einstein condensate. Open the valve on the apparatus to equalize the gas pressure. Close the valve and do not open it again during the experiments. Experiment #1. Use the small data table to record your temperature and pressure readings. Fill your beaker with 500mL of ice and fill with water to 800mL. Submerge the sphere of the apparatus in the water. When the pressure reading has stabilized record the pressure. Empty the beaker Experiment#2. Fill the beaker with 800mL of room temperature tap water. Submerge the sphere of the apparatus in the water. When the pressure reading has stabilized record the pressure. Experiment#3. Next is the most dangerous part of the experiments because of the heat. The burner can cause serious injury – all parts of it become hot. Boiling water can cause serious injury. Wear goggles and aprons at all times and do not leave the beaker or apparatus unattended. Place your beaker on the stove with 800mL of water and set the temperature to “HI.” When the water is fully boiling submerge the sphere carefully in the water. When the pressure reading has stabilized record the pressure. Remove the sphere. It will be hot! Turn off the burner and unplug it. It will be hot! Leave the beaker to cool. Plot your data on the graph and extend the line to approximate absolute zero. Answer the following questions and write your conclusions. 1. 2. 3. 4. 5. 6. 7.
8. 9.
What is absolute zero in degrees Celsius? What happens to confined gases when they are heated? ...cooled? What would happen if an unconfined gas was heated? …cooled? What law shows the relationship between volume and pressure? Temperature and volume? Why is it a bad idea to leave a scuba tank locked in the trunk of a car? What state would matter be in at absolute zero? Pressure Do you think it is possible for scientists to reach Temp °C (psi) absolute zero? (No molecular motion at all.) Why or dry ice why not? ice water What would be the pressure at absolute zero? room temp Explain one thing you learned in this lab. boiling water
8. 9.
What is absolute zero in degrees Celsius? What happens to confined gases when they are heated? ...cooled? What would happen if an unconfined gas was heated? …cooled? What law shows the relationship between volume and pressure? Temperature and volume? Why is it a bad idea to leave a scuba tank locked in the trunk of a car? What state would matter be in at absolute zero? Pressure Do you think it is possible for scientists to reach Temp °C (psi) absolute zero? (No molecular motion at all.) Why or dry ice why not? ice water What would be the pressure at absolute zero? room temp Explain one thing you learned in this lab. boiling water
