Entropy

    Cards (16)

    • How is the entropy of the system calculated?

      By subtracting the total entropy of the reactants from the total entropy of the products
    • What is the formula for calculating the entropy of the surroundings?

      \( S_{\text{surroundings}} = -\frac{\Delta H}{T} \)
    • What must the temperature be in when calculating the entropy of the surroundings?
      Kelvin
    • What is the unit for enthalpy change (\( \Delta H \))?

      Kilojoules per mole
    • Why is it important to convert temperatures from Celsius to Kelvin?

      Because calculations require temperature in Kelvin
    • If the enthalpy change (\( \Delta H \)) is given as -1270 kJ/mol, what is the value used in the entropy of the surroundings calculation?

      1270 kJ/mol
    • How do you convert kilojoules to joules in the context of entropy calculations?

      By multiplying by 1000
    • What is the standard temperature used in the calculations?

      298 Kelvin
    • What does a positive total entropy change indicate about a reaction?

      It indicates that the reaction is kinetically feasible and can occur spontaneously
    • How is the total entropy change calculated?

      By adding the entropy of the system to the entropy of the surroundings
    • What is the total entropy change for the reaction discussed in the video?

      4053.5 joules per Kelvin per mole
    • What does a negative total entropy change signify?

      It signifies that the reaction is not kinetically feasible and will not occur spontaneously
    • Entropy can never decrease in an isolated system, it can only remain constant or increase.
    • Increasing temperature leads to an increase in entropy due to increased molecular motion and energy dispersal.
    • The second law of thermodynamics states that entropy always increases over time, meaning that systems naturally become more disordered and less organized.
    • Entropy can be defined as the measure of disorder or randomness in a system.
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