Post-Lab Reflection Questions Answer the reflection questions using what you have learned from the lesson and your experimental data. It will be helpful to refer to your chemistry journal notes. Answer questions in complete sentences.
1. Why was the line of best fit method used to determine the experimental value of absolute zero?

2. Which gas law is this experiment investigating? How does your graph represent the gas law under investigation?

3. Using your knowledge of the kinetic molecular theory of gases, describe the relationship between volume and temperature of an ideal gas. Explain how this is reflected in your lab data.

4. Pressure and number of moles remained constant during this experiment. If you wanted to test one of these variables in a future experiment, how would you use your knowledge of gas laws to set up the investigation?

1.Why was the line of best fit method used to determine the experimental value of absolute zero?

The line of best fit method is used to determine the experimental value, because it most accurately shows where the line crosses the x-axis.

2.Which gas law is this experiment investigating? How does your graph represent the gas law under investigation?  

This investigation is experimenting the “Ideal Gas Law”. This law by Gay-Lussac shows that when the volume in a container of a gas is held constant, while the temperature is increased, the pressure will also increase.

3.Using your knowledge of the kinetic molecular theory of gases, describe the relationship between volume and temperature of an ideal gas. Explain how this is reflected in your lab data.  

As temperature increases, volume increases when pressure is held constant. As seen in the chart, as the temperature increases the volume in each gas also increases slightly.

4.Pressure and number of moles remained constant during this experiment. If you wanted to test one of these variables in a future experiment, how would you use your knowledge of gas laws to set up the investigation?

Supposedly at a constant temperature, the gas volume and pressure stay constant. Therefore, the amount of moles also remains constant. So perhaps, the temperature could fluctuate, meaning it will not only increase or decrease, but do both. This will avoid consistency and prove the Ideal Gas Law to be true.

Explanation: