Understanding Partial Pressure in Gas Mixtures
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Questions and Answers

What is the definition of partial pressure?

  • The total force a substance applies over an area
  • The pressure of each gas in a mixture (correct)
  • The total volume of a gas mixture
  • The percentage composition of a gas in a mixture

    • How does pressure and volume relate to each other in gases?

  • They have an inverse relationship (correct)
  • They have no relation
  • They both increase together
  • They have a direct relationship

    • What is the composition of air in terms of nitrogen, oxygen, and other gases?

  • 75% nitrogen, 20% oxygen, 5% others
  • 78% nitrogen, 21% oxygen, 1% others (correct)
  • 70% nitrogen, 30% oxygen, 0% others
  • 80% nitrogen, 10% oxygen, 10% others

    • Which factor has a direct relationship with pressure?

    <p>Temperature</p> Signup and view all the answers

    Why is understanding partial pressure important when analyzing gas mixtures?

    <p>To identify the pressure exerted by each gas in the mixture</p> Signup and view all the answers

    What is the partial pressure of gas Z in the first example provided?

    <p>0.57 atm</p> Signup and view all the answers

    In the second example, what is the total pressure of gases in the collection tube?

    <p>890 torr</p> Signup and view all the answers

    What does Dalton's Law of Partial Pressure help determine?

    <p>Pressure of individual gases in a mixture</p> Signup and view all the answers

    Why can real gases sometimes not follow all the rules of an ideal gas according to the text?

    <p>Because they violate kinetic molecular theory at low pressures or high temperatures</p> Signup and view all the answers

    When can Dalton's Law of Partial Pressure be accurately applied?

    <p>At low pressures or high temperatures</p> Signup and view all the answers

    What is the main concept behind Dalton's Law of Partial Pressures?

    <p>The pressures of all gases in a mixture add up to the total pressure of the gas solution.</p> Signup and view all the answers

    How can the partial pressure formula, PT = P1 + P2 + P3 + PN, be applied?

    <p>It is used to determine the individual pressures of gases in a mixture.</p> Signup and view all the answers

    Why is the concept of mole ratio important when comparing gas compositions?

    <p>It allows for comparison even when gases have different volumes or masses.</p> Signup and view all the answers

    How does vapor pressure affect the total pressure of a gas when it bubbles through water?

    <p>It increases the total pressure due to the presence of water molecules.</p> Signup and view all the answers

    In Example 1 from the text, what was the key reason behind using Dalton's Law of Partial Pressures?

    <p>To calculate the partial pressure of gas Z.</p> Signup and view all the answers

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