Charles's Law: Lab Report
1) Complete the Charles's Law Lab Report (below)
2) DOWNLOAD your Lab Report + post to the Google Classroom LAB. 2.12 Charles's Law when finish.
EXP. 2.12: Charlesâs Law Lab Report
Reminder: You will download or save a PDF at the end and upload it to Google Classroom .
I. Purpose:
In your own words, describe the purpose of this lab. (What were you trying to observe and test?)
Purpose Response
Explain how heating the can and then cooling it in an ice bath helps test Charlesâs Law. Use the words âvolume,â âtemperature,â and âconstant pressure.â
II. Materials:
(see turned-in lab handout)
III. Procedures:
(see turned-in lab handout)
IV. Data:
(see completed data chart on turned-in lab handout)
V. Calculations:
Complete the calculations with all work shown on the back of your lab handout (attach a separate paper if necessary). Also complete the following Charlesâs Law Questions.
Reminder for the back of your handout (V. Calculations): Write Charlesâs Law, calculate Theoretical V2 using V1, T1, T2, calculate the difference (Experimental V2 vs Theoretical V2), calculate % error, and explain what your % error says about accuracy.
| V1 (mL) | T1 (°C) | T2 (°C) | Experimental V2 (mL) |
|---|---|---|---|
| V1 (mL) | T1 (°C) | T2 (°C) | Experimental V2 (mL) |
|---|---|---|---|
VI. Questions & Research
Answer using complete sentences. Be specific to your lab groupâs setup (your can, your temperatures, and your measurements). Try to explain the âwhy,â not just the âwhat.â
1) State Charlesâs Law and explain it.
Write Charlesâs Law in words and explain what it predicts for a gas when pressure is constant. Include a real example from this lab (heated can â ice bath).
2) What does âconstant pressureâ even mean?
In this lab, what would it mean for pressure to stay constant, and what would cause pressure to not be constant? Talk about the can opening/closing and the air pushing on the can.
3) Brand + can material: what did you use and what would change for a non-aluminum can?
Identify the brand/type of can your group used. Then explain, in detail, how you would change the experiment if the can were not aluminum (different material/thickness/strength). Be specific about heat transfer, crushing, and safety.
4) How does volume change with temperature at constant pressure?
Explain the relationship (increase/decrease) and connect it to particle motion. Use the phrase âaverage kinetic energy.â
5) Ice bath change: how would adding more ice affect volume?
Predict what happens if the ice bath is colder (more ice / less warm water). Explain why using Charlesâs Law and kinetic theory. Mention what would happen to T2 and the predicted V2.
6) Temperature errors: how might they have affected this lab?
Explain one realistic way your measured T1 or T2 could be off, and describe how that would change the theoretical V2 and percent error. Use the word âoverestimateâ or âunderestimate.â
7) Kinetic Molecular Theory connection
Connect Charlesâs Law to kinetic molecular theory. Explain how temperature changes particle motion and why that changes volume. Make it sound like a science explanation, not a definition list.
8) Straw question: explain drinking through a straw using a gas law + formula
Use one gas law (Boyleâs Law works well) to explain how a straw works. Write the formula and explain which variable changes. Talk about pressure in your mouth vs atmospheric pressure.
9) Balloon verification: how could we experimentally verify Charlesâs Law with a balloon?
Propose a balloon experiment with at least two temperatures. Explain what you would measure and how youâd keep pressure âconstant enough.â Mention at least one control variable.
10) Weather balloon behavior
Imagine a weather balloon rising into colder air. Predict what happens to its volume and explain your reasoning using Charlesâs Law language. State what happens to temperature with altitude (in general).
11) Celsius â Kelvin: why does it matter for calculations?
State your groupâs Celsius temperatures (T1 and T2) and explain how converting to Kelvin changes the math. Explain why using °C directly would break the proportional relationship.
12) Real-life applications youâve used
Research and describe two everyday situations you have personally experienced where gas volume changes because temperature changes. Explain each situation with a cause â effect chain.
13) Hot air balloons: design connection
Explain how Charlesâs Law can be applied in the design of hot air balloons. Mention how heating air affects volume and density, and why that matters for lift.
14) Factors that could affect accuracy in your can experiment
List and explain at least three factors that could have affected accuracy in your groupâs setup. At least one should be about measurement, and one about timing/heat transfer.
15) Limitations of Charlesâs Law (research)
Research and determine at least one limitation of Charlesâs Law. Explain what conditions make the law less accurate. Mention âideal gasâ and what happens at extreme temperatures/pressures.
16) Industrial âreal worldâ application (research)
Research and describe one industrial or engineering application where Charlesâs Law matters. Explain how temperature control prevents problems or improves performance. Be specific: what device/system, what gas, and what changes.
Tip: A sentence usually ends with a period, question mark, or exclamation point.
Assignment Complete
Student:
Next step: Click Download PDF, then upload your PDF to Google Classroom .
Upload tip: Upload the downloaded PDF file to the assignment.