Cards (30)

    • What does entropy measure in thermodynamics?
      Disorder or randomness
    • Entropy is lowest in solids because their molecules are highly ordered.

      True
    • Gases have the highest entropy because their molecules are highly disordered
    • Processes that decrease disorder result in a decrease in entropy.

      True
    • Why do solids have low entropy?
      Highly ordered structure
    • Entropy is lowest in solids because their molecules are highly ordered.
    • A higher entropy value indicates greater disorder
    • The entropy of a solid is low because its molecular arrangement is highly ordered.
    • The entropy of a liquid is moderate because its molecular arrangement is less ordered than a solid.
    • The entropy of a gas is high because its molecular arrangement is highly disordered.
    • Increasing temperature generally increases entropy.

      True
    • Mixing substances or solutions increases entropy by creating a more random distribution of particles.
    • Solids have low entropy because their molecules are arranged in a highly ordered crystalline structure.
    • What is the formula for calculating entropy changes using standard entropy values (ΔS\Delta S^\circ)?

      ΔS=\Delta S^\circ =niSi(products)njSj(reactants) \sum n_{i} S_{i}^\circ(products) - \sum n_{j} S_{j}^\circ(reactants)
    • Higher temperatures generally increase entropy changes.
      True
    • The reaction 2 \ce{H2(g)} + \ce{O2(g)} \to 2 \ce{H2O(l)} has a negative entropy change.

      True
    • A process is more likely to occur spontaneously if it results in an increase in entropy
    • In which state of matter is entropy highest?
      Gas
    • Why does mixing substances increase entropy?
      Creates random distribution
    • Entropy helps predict the spontaneity of physical and chemical processes.
    • Gases have the highest entropy due to their highly disordered molecular arrangement.

      True
    • What is the relationship between entropy and spontaneity in thermodynamics?
      Increase in entropy leads to spontaneity
    • Entropy helps predict the spontaneity of physical and chemical processes.
      True
    • A process is more likely to occur spontaneously if it results in an increase in entropy.

      True
    • Entropy is denoted by the symbol S.

      True
    • Order the states of matter from lowest to highest entropy:
      1️⃣ Solid
      2️⃣ Liquid
      3️⃣ Gas
    • Phase changes from solid to liquid to gas typically increase entropy.

      True
    • Gases have the highest entropy due to their highly disordered molecular arrangement.

      True
    • In the formula for ΔS\Delta S^\circ, nin_{i} and njn_{j} represent the stoichiometric coefficients of the products and reactants, respectively.
    • Transitions from solid to liquid to gas typically increase entropy due to the more disordered molecular arrangement.