Activity #3- Constant Temperature 1. Reset the system again. 2. Add 200 light molecules. 3. Set the Constant Parameter button to "Temperature." What is the temperature? 300K 4. Record the volume and pressure of the system. Volume __________ nm3 Pressure: 23.5 Atm 5. Predict what will happen to the pressure if you change the volume. 6. While you are watching the heat control, move the handle so that the volume of the chamber is smaller. 7. What happens to the temperature and pressure as you change the volume? 8. Record the temperature and pressure of the system three more times. Volume __________ nm3 Pressure: __________ Atm Volume __________ nm3 Pressure: __________ Atm Volume __________ nm3 Pressure: __________ Atm 9. What is this mathematical relationship between the pressure and the volume, direct or inverse? Inverse. 10. Write the mathematical equation for this relationship and the name of the scientist credited with its discovery. Boyle's Law: At a constant temperature and constant amount of gas, PRESSURE and VOLUME are inversely proportional to one another. P1V1 = P2V2 11. Create a graph from your collected data. Add a caption explicitly stating the relationship between the two variables.
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If we decrease the volume, the pressure will increase. This is because the number of gas molecules remains constant, but they are now confined to a smaller space, leading to more frequent collisions with the walls of the container, resulting in an increase in Show more…
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How does temperature affect the kinetic energy of gas molecules? What are the names and equations for the three gas laws tested in this lab? Complete the following statements: When T is constant and volume increases, the pressure _________ When T is constant and volume decreases, the pressure _________ When V is constant and temperature increases, the pressure ______ When V is constant and temperature decreases, the pressure ______ When P is constant and temperature increases, the volume _______ When P is constant and temperature decreases, the volume _______ A sample of helium has a volume of 325 mL and a pressure of 655 mm Hg. What will be the pressure if the helium is compressed to 125 mL (T constant)? A gas with a volume of 525 mL at a temperature of -25°C is heated to 75°C. What is the new volume of the gas if pressure and quantity of gas are held constant? Results Table 1: Boyle's Law: Pressure and Volume Temperature: ________ Calculations for Pressure: Volume (L) Pressure (atm) V1 = P1 = V2 = P2 = V3 = P3 = V4 = P4 = V5 = P5 = Table 2: Charles' Law: Volume and Temperature Pressure: ________ Calculations for Volume: Temperature (K) Volume (L) T1 = V1 = T2 = V2 = T3 = V3 = T4 = V4 = T5 = V5 = Table 3: Gay-Lussac's Law: Pressure and Temperature Volume: ________ Calculations for Pressure: Temperature (K) Pressure (atm) T1 = P1 = T2 = P2 = T3 = P3 = T4 = P4 = T5 = P5 = Questions According to your 1st graph, is the relationship between pressure and volume direct or inverse? A 75.0 mL sample of oxygen has a pressure of 1.50 atm. What will be the new volume if the pressure becomes 4.50 atm (T constant)? According to your 2nd graph, is the relationship between volume and temperature direct or inverse? From your 2nd graph, estimate the volume of the gas at a temperature of 350 K using the line on the graph. Show this point on your graph. A gas has a volume of 2.8 L at a temperature of 27°C. What temperature is needed to expand the volume to 4.5 L (P constant)? According to your 3rd graph, is the relationship between pressure and temperature direct or inverse? From your 3rd graph, estimate the pressure of the gas at a temperature of 350 K using the line on the graph. Show this point on your graph. A sample of carbon dioxide gas has a pressure of 1.2 atm at a temperature of 25°C. If the temperature is decreased to -10.0°C, what will be the new pressure (V constant)?
Experiment One: Constant volume. Move the button of temperature up to Heat. Leave the oxygen at 150 K. In the table below, record the pressure and temperature of the oxygen in the first row. Heat the oxygen to about 450 K. Record the new temperature and pressure in the second row of the table. Heat the oxygen to about 900 K. Record the new temperature and pressure in the third row of the table. Temperature (K) Pressure (atm) Answer the questions. 1. Write a statement describing how the temperature of a quantity of a gas is related to its pressure at constant volume.
Cyra Jelle C.
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