What is the entropy change of the universe for the following transition? H20 (liquid at -2oC)...
What is the entropy change of the universe for the following transition?
H20 (liquid at -2oC) ---> H2O (ice, at -2oC). Why is the transition spontaneous?
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What is the entropy change of the universe for the following
transition?
H20 (liquid at -2oC)...
20. Which of the following statements is FALSE? A. The entropy of the universe increases during...
20. Which of the following statements is FALSE? A. The entropy of the universe increases during spontaneous processes. B. During chemical and physical changes, energy is conserved. C. The entropy of H2O liquid is greater than the entropy of H2O solid at 0°C. D. The entropy of O2(g) should be greater than the entropy of CO2(g) when at the same temperature, E. The absolute entropy of a substance generally decreases when temperature decreases.
2.A certain compound undergoes a solid + liquid phase transition at -25.5°C. The entropy change AS,...
2.A certain compound undergoes a solid + liquid phase transition at -25.5°C. The entropy change AS, associated with the phase transition at this temperature is 53.8 J mor' K". What is the amount of heat energy. 9, that is absorbed to give this value for AS? (8 points) 8. Use the data in the appendix to calculate the standard entropy change, ASo, for the combustion of 1 mole of methane, CHe() (note: all reactants and products are in the gaseous...
Please help with detailed explanation 8) Phase change (homework) Calculate the entropy change in the universe...
Please help with detailed
explanation
8) Phase change (homework) Calculate the entropy change in the universe when a 15.0 g ice cube melts (0°C) in your hand (37°C). Given: AfusH = 6.01 x 103 J/mol 9) Phase change at Boiling point Predict the normal boiling point in °C) of sodium, given that the entropy of 1 mol Na (l) changes by +84.8 J/K when it forms a vapour at 1 bar pressure, with ApapH = +98.0 kJ/mol Remember: The liquid...
What is the entropy change of the universe (in J K-1)when 2.00 mol of liquid water...
What is the entropy change of the universe (in J K-1)when 2.00 mol of liquid water at 0 °C freezes in a freezer compartment whose temperature is -15 °C? Assume the freezer is a perfect insulator. (AHfus = 6.01 kJ mol-1 for water) Select one: O a. +90.6 O b. +46.6 C. -2.6 O d. -44.0 o e. +2.6
Find the standard entropy of the universe for the following reaction at 298K. CH4(g) + 2...
Find the standard entropy of the universe for the following reaction at 298K. CH4(g) + 2 O2(g)----> CO2(g) + 2 H2O (g) Is the reaction spontaneous? Explain.
What is the entropy change in J/K to the universe when a dry ice (CO2) sculpture...
What is the entropy change in J/K to the universe when a dry ice (CO2) sculpture weighing 386.1 g sublimates on a table top at 21.7 °C and the process occurs reversibly? The temperatures of the dry ice solid and vapour are both -78.5 °C, and the heat of sublimation of dry ice is 21.6 kJ/mol. (2 marks) (Give answer to 3 significant figures.)
CHANGES IN ENTROPY OF UNIVERSE VS SYSTEM. Evaluating Spontaneity Considering both Entropy and Enthalpy 7. In...
CHANGES IN ENTROPY OF UNIVERSE VS SYSTEM. Evaluating Spontaneity Considering both Entropy and Enthalpy 7. In a spontaneous process, which of the following always increases? a. the entropy of the system b. the entropy of the surroundings c. the entropy of the universe d. the entropy of the system and the universe c. the entropy of the system, surroundings and the universe (Hand S refer to the system), a. AH>0 8. Processes are always spontaneous, regardless of temperature, when and...
For the following reaction, at 25 °C (room temperature), what is the entropy change of the...
For the following reaction, at 25 °C (room temperature), what is the entropy change of the system? H2O(l) → H2O(s). A) ΔSsys < 0 B) ΔSsys > 0 C) ΔSsys = 0 ----------------------------------------------------------------------------------------------------------------------------- For the following reaction, at 25 °C (room temperature), what is the entropy change of the surroundings? H2O(l) → H2O(s) A) ΔSsurr < 0 B) ΔSsurr = 0 C) ΔSsurr > 0 ---------------------------------------------------------------------------------------------------------- For the following reaction, at 25 °C (room temperature), what is the entropy change...
Indicate whether each statement is true or false. (a) The entropy of the universe increases for...
Indicate whether each statement is true or false. (a) The entropy of the universe increases for any spontaneous process. (b) The entropy change of the system is equal and opposite that of the surroundings for any irreversible process. (c) The entropy of the system must increase in any spontaneous process. (d) The entropy change for an isothermal process depends on both the absolute temperature and the amount of heat reversibly transferred.
why are the other options wrong? For a process to be spontaneous: the entropy of universe increases and Gibbs energy of...
why are the other options wrong?
For a process to be spontaneous: the entropy of universe increases and Gibbs energy of the system decreases. a) the entropy of system decreases and Gibbs energy of the b) universe increases. the entropy of system increases and Gibbs energy of the universe decreases. c) of universe decreases and Gibbs energy of the d) the entropy increases system
20. Which of the following statements is FALSE? A. The entropy of the universe increases during spontaneous processes. B. During chemical and physical changes, energy is conserved. C. The entropy of H2O liquid is greater than the entropy of H2O solid at 0°C. D. The entropy of O2(g) should be greater than the entropy of CO2(g) when at the same temperature, E. The absolute entropy of a substance generally decreases when temperature decreases.
2.A certain compound undergoes a solid + liquid phase transition at -25.5°C. The entropy change AS, associated with the phase transition at this temperature is 53.8 J mor' K". What is the amount of heat energy. 9, that is absorbed to give this value for AS? (8 points) 8. Use the data in the appendix to calculate the standard entropy change, ASo, for the combustion of 1 mole of methane, CHe() (note: all reactants and products are in the gaseous...
Please help with detailed
explanation
8) Phase change (homework) Calculate the entropy change in the universe when a 15.0 g ice cube melts (0°C) in your hand (37°C). Given: AfusH = 6.01 x 103 J/mol 9) Phase change at Boiling point Predict the normal boiling point in °C) of sodium, given that the entropy of 1 mol Na (l) changes by +84.8 J/K when it forms a vapour at 1 bar pressure, with ApapH = +98.0 kJ/mol Remember: The liquid...
What is the entropy change of the universe (in J K-1)when 2.00 mol of liquid water at 0 °C freezes in a freezer compartment whose temperature is -15 °C? Assume the freezer is a perfect insulator. (AHfus = 6.01 kJ mol-1 for water) Select one: O a. +90.6 O b. +46.6 C. -2.6 O d. -44.0 o e. +2.6
What is the entropy change in J/K to the universe when a dry ice (CO2) sculpture weighing 386.1 g sublimates on a table top at 21.7 °C and the process occurs reversibly? The temperatures of the dry ice solid and vapour are both -78.5 °C, and the heat of sublimation of dry ice is 21.6 kJ/mol. (2 marks) (Give answer to 3 significant figures.)
CHANGES IN ENTROPY OF UNIVERSE VS SYSTEM. Evaluating Spontaneity Considering both Entropy and Enthalpy 7. In a spontaneous process, which of the following always increases? a. the entropy of the system b. the entropy of the surroundings c. the entropy of the universe d. the entropy of the system and the universe c. the entropy of the system, surroundings and the universe (Hand S refer to the system), a. AH>0 8. Processes are always spontaneous, regardless of temperature, when and...
why are the other options wrong?
For a process to be spontaneous: the entropy of universe increases and Gibbs energy of the system decreases. a) the entropy of system decreases and Gibbs energy of the b) universe increases. the entropy of system increases and Gibbs energy of the universe decreases. c) of universe decreases and Gibbs energy of the d) the entropy increases system
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