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The Gas Laws: Flashcards

Revise Boyle's, Charles's, Gay-Lussac's and Avogadro's laws, the combined gas law and PV = nRT.

10 cardsIntermediate

10 cards

  1. Question
    State Boyle's law.
    Answer

    At constant n and T, pressure is inversely proportional to volume: P1V1=P2V2P_1V_1 = P_2V_2

  2. Question
    State Charles's law.
    Answer

    At constant n and P, volume is proportional to kelvin temperature: V1/T1=V2/T2V_1/T_1 = V_2/T_2

  3. Question
    State Gay-Lussac's law.
    Answer

    At constant n and V, pressure is proportional to kelvin temperature: P1/T1=P2/T2P_1/T_1 = P_2/T_2

  4. Question
    State Avogadro's law.
    Answer

    At constant P and T, volume is proportional to the number of moles: V1/n1=V2/n2V_1/n_1 = V_2/n_2

  5. Question
    Write the ideal gas law.
    Answer

    PV=nRTPV = nRT

  6. Question
    Give two values of the gas constant R.
    Answer

    0.08206 L·atm/(mol·K) and 8.314 L·kPa/(mol·K)

  7. Question
    Convert 25 °C to kelvin.
    Answer

    25 °C + 273.15 = 298.15 K (about 298 K)

  8. Question
    Why must gas law temperatures be in kelvin?
    Answer

    Kelvin starts at absolute zero, so V and P are proportional to it. In °C, doubling the number does not double the temperature.

  9. Question
    What volume does 1 mol of ideal gas occupy at 0 °C and 1 atm?
    Answer

    About 22.4 L

  10. Question
    Write the combined gas law.
    Answer

    P1V1T1=P2V2T2\dfrac{P_1V_1}{T_1} = \dfrac{P_2V_2}{T_2}