Entropy Entropy 1 / 10 In an isolated system, the entropy change for any spontaneous process is: Zero Positive Negative Indeterminate 2 / 10 For a reversible isothermal expansion of an ideal gas, the entropy change of the system is: q/T -q/T Zero Depends on the gas 3 / 10 Entropy is a measure of: Energy content Disorder or randomness Enthalpy of the system Internal energy 4 / 10 Which of the following processes results in a decrease in entropy? Freezing of water Melting of ice Evaporation of water Sublimation of dry ice 5 / 10 The entropy change for the universe (ΔS_univ) during a reversible process is: Greater than zero Less than zero Equal to zero Indeterminate 6 / 10 When a system absorbs heat at constant pressure, the entropy of the system: Decreases Increases Remains constant Depends on the temperature 7 / 10 The entropy change associated with the phase transition from liquid to gas is: Positive Negative Zero Indeterminate 8 / 10 If the entropy change of the surroundings (ΔS_surroundings) is -50 J/K and the entropy change of the system (ΔS_system) is +70 J/K, the entropy change of the universe (ΔS_univ) is: -20 J/K +20 J/K +120 J/K Zero 9 / 10 For a spontaneous process at constant temperature and pressure, which of the following must be true? ΔS_system > 0 ΔS_univ > 0 ΔS_surroundings < 0 ΔS_system = ΔS_surroundings 10 / 10 Entropy is maximized at: Absolute zero temperature Critical temperature Thermal equilibrium Melting point Your score is By WordPress Quiz plugin
