BrianGriffin
BrianGriffin Feb 28, 2026 • 0 views

AP Physics C Questions on Charles's Law: Test Prep

Hey future physicists! 👋 Feeling stressed about AP Physics C and Charles's Law? No worries, I've got your back! This study guide and practice quiz will help you ace those questions. Let's dive in! 🧲
⚛️ Physics

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joshuahodge1992 Dec 28, 2025

📚 Quick Study Guide

  • 🌡️ Charles's Law describes how gases tend to expand when heated.
  • 🧮 The formula for Charles's Law is: $\frac{V_1}{T_1} = \frac{V_2}{T_2}$, where $V$ is volume and $T$ is temperature (in Kelvin).
  • ⚠️ Temperature MUST be in Kelvin. To convert from Celsius to Kelvin: $T(K) = T(°C) + 273.15$.
  • ⚛️ Charles's Law assumes constant pressure and number of moles.
  • 🧪 This law is a special case of the Ideal Gas Law.
  • 💡 Remember, volume and temperature are directly proportional. If temperature increases, volume increases proportionally.

Practice Quiz

  1. A gas occupies 5.0 L at 27°C. What volume will it occupy at 227°C, assuming constant pressure?
    1. 2.5 L
    2. 6.7 L
    3. 8.3 L
    4. 10.0 L
  2. A balloon has a volume of 2.0 L at 20°C. If the temperature is increased to 40°C, what is the new volume, assuming constant pressure?
    1. 1.0 L
    2. 2.14 L
    3. 4.0 L
    4. 0.8 L
  3. A container of gas at 300 K has a volume of 10.0 L. If the volume is decreased to 5.0 L, what is the new temperature, assuming constant pressure?
    1. 150 K
    2. 300 K
    3. 450 K
    4. 600 K
  4. A gas occupies a volume of 12.0 L at 10°C. At what temperature will the gas occupy a volume of 15.0 L, assuming constant pressure?
    1. 7.5 °C
    2. 37.5 °C
    3. 64.8 °C
    4. 92.1 °C
  5. If a gas has a volume of 4.0 L at standard temperature (0°C), what is the volume if the temperature is doubled (to 0°C * 2 = 0°C)?
    1. 2.0 L
    2. 4.0 L
    3. 8.0 L
    4. 16.0 L
  6. A cylinder contains 8.0 L of gas at 25°C. If the temperature is reduced to -25°C, what is the new volume, assuming constant pressure?
    1. 6.7 L
    2. 7.3 L
    3. 8.7 L
    4. 9.3 L
  7. A gas occupies 20.0 L at 30°C. What volume will it occupy at -30°C, assuming constant pressure?
    1. 14.5 L
    2. 16.5 L
    3. 18.5 L
    4. 22.5 L
Click to see Answers
  1. C
  2. B
  3. A
  4. D
  5. B
  6. B
  7. A

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