Gas Laws: Boyle's And Charles' Law

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Kwchiro
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Gas Laws: Boyles And Charles Law - Quiz

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Questions and Answers
  • 1. 

    A balloon occupies a volume of 2.0 L at 40oC. How much volume will it occupy at 30oC?

    • A. 

      1.5 L

    • B. 

      1.94 L

    • C. 

      1.6 L

    Correct Answer
    B. 1.94 L
    Explanation
    Make sure you change to Kelvin!! (add 273) or you will get the WRONG answer!!
    V1/T1 = V2/T2 Charles' law

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  • 2. 

    What is the final pressure in a balloon when the volume is changed from 1.5  L to a volume of 2.5L at constant temperature? (Initial pressure is 1.1 atm).

    • A. 

      .66 atm

    • B. 

      .66 kPa

    • C. 

      4.125 atm

    Correct Answer
    A. .66 atm
    Explanation
    Boyle's Law: (P1) (V1) = (P2) (V2)
    The units will be the SAME on both sides of the equation.

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  • 3. 

    Gas in a balloon occupies 3.3  L. What volume will it occupy if the pressure is changed from 100 kPa to 90  kPa (at constant temperature of 310 K (about room temperature).

    • A. 

      29,700 L

    • B. 

      2.97 L

    • C. 

      3.6 L

    Correct Answer
    C. 3.6 L
    Explanation
    Boyle's Law: (P1) (V1) = (P2) (V2)
    The units will be the SAME on both sides of the equation.

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  • 4. 

    What is the final pressure in a vessel when the volume is changed from 1.3  L to a volume of 1.55 L at constant temperature? (Initial pressure is 1.5 atm).

    • A. 

      1.25 L

    • B. 

      1.65 L

    • C. 

      1.49 L

    Correct Answer
    A. 1.25 L
    Explanation
    Boyle's Law: (P1) (V1) = (P2) (V2)
    The units will be the SAME on both sides of the equation.

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  • 5. 

    A balloon occupies 3.2 L at 37oC. How much will it occupy at 42oC?

    • A. 

      3.15 L

    • B. 

      3.25 L

    • C. 

      312,480 L

    Correct Answer
    B. 3.25 L
    Explanation
    Make sure you change to Kelvin!! (add 273) or you will get the WRONG answer!!
    V1/T1 = V2/T2 Charles' law

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  • 6. 

    A gas occupies a balloon with a volume 2.0 L at 33oC. How much volume will it occupy at 37oC, if pressure remains constant.

    • A. 

      1.97 L

    • B. 

      186,000 L

    • C. 

      2.06 L

    Correct Answer
    C. 2.06 L
    Explanation
    Make sure you change to Kelvin!! (add 273) or you will get the WRONG answer!!
    V1/T1 = V2/T2 Charles' law

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  • 7. 

    A gas expands from a volume 2.0 L at 36oC to a volume of 2.5 L, what is the final temperature, if the pressure is constant?

    • A. 

      386 K ( which equals 113.25 Celsius)

    • B. 

      247.2 K (which equals -25.8 C)

    • C. 

      61.8 K (which equals -211.2 C)

    Correct Answer
    A. 386 K ( which equals 113.25 Celsius)
    Explanation
    Make sure you change to Kelvin!! (add 273) or you will get the WRONG answer!!
    V1/T1 = V2/T2 Charles' law

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  • 8. 

    If the air inside a balloon is heated, the volume will:

    • A. 

      Increase

    • B. 

      Decrease

    • C. 

      Increase a little, then decrease.

    Correct Answer
    A. Increase
    Explanation
    Temperature and Volume are directly related (Charles' law): When temperature is increased, volume will also increase.

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  • 9. 

    The kinetic theory of gases, which of the following is important for an ideal gas:

    • A. 

      There is no attraction or repulsion between the gas molecules, whereas there IS attraction between molecules of liquids or solids.

    • B. 

      The distance between molecules in ideal gases is closer than in liquids or solids.

    • C. 

      The gases are NOT fluid

    Correct Answer
    A. There is no attraction or repulsion between the gas molecules, whereas there IS attraction between molecules of liquids or solids.
    Explanation
    The correct answer is that there is no attraction or repulsion between the gas molecules, whereas there IS attraction between molecules of liquids or solids. This is important for an ideal gas because it assumes that the gas molecules do not interact with each other, except during collisions. This allows for simplifications in the mathematical models used to describe the behavior of ideal gases. In contrast, liquids and solids have intermolecular forces that result in attractions between their molecules, leading to different behaviors and properties.

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  • 10. 

    Which of the following describes the relationship between P and V?            

    • A. 

      Directly proportional

    • B. 

      Inversely proportional

    • C. 

      Unrelated

    Correct Answer
    B. Inversely proportional
    Explanation
    The relationship between P and V is described as inversely proportional. This means that as one variable (P) increases, the other variable (V) decreases, and vice versa. In other words, there is a negative correlation between P and V, where an increase in one variable corresponds to a decrease in the other variable.

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