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GOB Chemistry: Gas Laws and Concepts

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  • What is Boyle's Law?
    Boyle's Law states that \(P_1V_1=P_2V_2\), meaning pressure and volume of a gas are inversely proportional at constant temperature.
  • State Charles' Law.
    Charles' Law states that \(\frac{V_1}{T_1}=\frac{V_2}{T_2}\), meaning volume and temperature of a gas are directly proportional at constant pressure.
  • What does Gay-Lussac's Law describe?
    Gay-Lussac's Law states that \(\frac{P_1}{T_1}=\frac{P_2}{T_2}\), meaning pressure and temperature of a gas are directly proportional at constant volume.
  • Explain the Combined Gas Law.
    The Combined Gas Law combines Boyle's, Charles', and Gay-Lussac's laws: \(\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}\), relating pressure, volume, and temperature changes.
  • What is Avogadro's Law?
    Avogadro's Law states that \(\frac{V_1}{n_1}=\frac{V_2}{n_2}\), meaning volume and amount of gas (moles) are directly proportional at constant temperature and pressure.
  • State Dalton's Law of Partial Pressures.
    Dalton's Law states that the total pressure of a gas mixture is the sum of the partial pressures: \(P_{total}=P_1+P_2+P_3+...\).
  • What are the four basic properties of gases?
    The four basic properties are pressure, volume, temperature, and amount of gas (moles).
  • Define atmospheric pressure.
    Atmospheric pressure is the pressure exerted by the weight of air in the atmosphere on a surface.
  • Convert 1 atm to mmHg and Torr.
    1 atm equals 760 mmHg and 760 Torr.
  • What is the relationship between mmHg and Torr?
    1 mmHg is equal to 1 Torr; they are used interchangeably.
  • Convert 0°C to Kelvin.
    0°C equals 273 K.
  • What is the molar volume of a gas at STP?
    At STP, 1 mole of gas occupies 22.4 liters.
  • How does pressure affect gas volume according to Boyle's Law?
    Pressure and volume are inversely proportional; increasing pressure decreases volume if temperature is constant.
  • How does temperature affect gas volume according to Charles' Law?
    Volume and temperature are directly proportional; increasing temperature increases volume if pressure is constant.
  • How does temperature affect gas pressure according to Gay-Lussac's Law?
    Pressure and temperature are directly proportional; increasing temperature increases pressure if volume is constant.
  • How do you use the Combined Gas Law in calculations?
    Use \(\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}\) to find unknown pressure, volume, or temperature when others change.
  • How is Avogadro's Law applied in gas calculations?
    Use \(\frac{V_1}{n_1}=\frac{V_2}{n_2}\) to relate volume changes to moles of gas at constant temperature and pressure.
  • What is the significance of Dalton's Law in gas mixtures?
    It allows calculation of total pressure by summing partial pressures of individual gases in a mixture.
  • What is the Kinetic Molecular Theory of Gases?
    It explains gas behavior based on particle motion, stating gases consist of small particles in constant, random motion with elastic collisions.
  • List the key conversion factors for gas law calculations.
    1 atm = 760 mmHg = 760 Torr; 0°C = 273 K; 1 mole gas = 22.4 L at STP.