11.3: Boyle’s Law - Data and Report
- Page ID
- 557311
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DATA, OBSERVATIONS, AND CALCULATIONS
Name _____________________ Lab Partner(s) __________________________
Volume (mL) |
Pressure (kPa) |
Constant, k
|
|---|---|---|
* One way to determine if a relationship between pressure, P, and volume, V, is inverse or direct is to find a proportionality constant, k, from the data. If this relationship is direct, k = P/V. If it is inverse, k = P•V.
The report should include two graphs, P vs V and P vs 1/V, along with the above data, calculations, and data analysis questions below.
DATA ANALYSIS AND POST-LAB QUESTIONS
- With the best-fit curve still displayed on graph one or run one graph, choose Interpolate from the Analyze menu. A vertical cursor now appears on the graph. The cursor’s volume and pressure coordinates are displayed in the floating box. Move the cursor along the regression line until the volume value is 5.0 mL. Note the corresponding pressure value. Move the cursor until the volume value is doubled (10.0 mL). What does your data show happened to the pressure when the volume is doubled? Mention the actual pressure values in your answer.
- Using the same technique as in Question 1, what does your data show happens to the pressure if the volume is halved from 20.0 mL to 10.0 mL? Mention the actual pressure values in your answer.
- Using the same technique as in Question 1, what does your data show happens to the pressure if the volume is tripled from 5.0 mL to 15.0 mL? Mention the actual pressure values in your answer.
- From your answers to the first three questions and the shape of the curve in the plot of pressure vs. volume, do you think the relationship between the pressure and volume of a confined gas is direct or inverse? Explain your answer.
- Based on your data, what would you expect the pressure to be if the syringe volume were increased to 40.0 mL? Explain or show work to support your answer.
- Based on your data, what would you expect the pressure to be if the syringe volume were decreased to 2.5 mL? Explain or show work to support your answer.
- What experimental factors are assumed to be constant in this experiment?
- One way to determine if a relationship is inverse or direct is to find a proportionality constant, k, from the data. If this relationship is direct, k = P/V. If it is inverse, k = P•V. Based on your answer to Question 4, choose one of these formulas and calculate k for the seven ordered pairs in your data table (divide or multiply the P and V values). Mention which relationship you are using and show the answers in the third column of the Data and Calculations table.
- How constant were the values for k that you obtained in Question 8? Good data may show some minor variation, but the values for k should be relatively constant.
- Write an equation representing Boyle's law using P, V, and k. Write a verbal statement that correctly expresses Boyle’s law.
Please click here to access the Pre-Lab, Data Tables, and Post-Lab in Word or PDF format. Complete them and upload according to your instructor's instructions.