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Entropy quiz

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Terms in this set (10)

  • Which type of reaction decreases entropy within a cell?
    Photosynthesis, because it involves the conversion of carbon dioxide and water into glucose, which is a more ordered state.
  • Which is the best example of decreasing entropy: a) Melting ice, b) Freezing water, c) Evaporating alcohol, d) Dissolving salt in water?
    b) Freezing water, because it involves the transition from a liquid to a solid, which is a more ordered state.
  • How is order (entropy) maintained in a system?
    Order is maintained by inputting energy into the system, which counteracts the natural tendency towards disorder.
  • What term best describes entropy?
    Disorder, as entropy is a measure of the randomness or chaos within a system.
  • Which would have the most entropy: a) Solid ice, b) Liquid water, c) Water vapor, d) Ice-water mixture?
    c) Water vapor, because gases have the highest entropy due to their molecules being far apart and moving freely.
  • Which best explains why this is an example of increasing entropy: a) Ice melting, b) Water freezing, c) Gas condensing, d) Salt crystallizing?
    a) Ice melting, because it involves a transition from a solid to a liquid, increasing molecular disorder.
  • Which process shows a decrease in entropy of the system?
    b) Condensing steam, as it involves a transition from a gas to a liquid, which is a more ordered state.
  • What happens to entropy when a gas is compressed into a liquid?
    Entropy decreases because the molecules become more ordered as they are closer together in the liquid state.
  • How does temperature affect entropy?
    Higher temperatures increase molecular motion, leading to an increase in entropy.
  • What is the significance of the third law of thermodynamics in relation to entropy?
    The third law states that at absolute zero (0 Kelvin), the entropy of a perfect crystal is zero, indicating complete order.