Ethanol  has a normal boiling point of 352 K, and its ΔHvap is 38.6 kJ/mol. Calculate the molar entropy of vaporization (ΔSvap)

Q: “The most stable state of an isolated system is the state of maximum entropy”. Use the second law of…

A: Entropy change always exhibits the decrement or increment in the system's randomness. Any reaction's…

Q: Which of the following samples of substances is likely to have the largest entropy? 1 mol KCI(aq) 1…

A: The gas phase has highest entropy followed by liquid. Solids have lowest entropy.

Q: Calculate the change in entropy that occurs in the system when 55.0 g of water vaporizes from a…

A: Given data contains, Mass of water is 55.0 g. The boiling point is 100.0°C. Heat of vaporization is…

Q: Calculate the entropy change for the freezing of 112 g of ethanol, C2H5OH, at its freezing point of…

A: The entropy of a liquid is higher than the solid, hence during the freezing, the entropy of the…

Q: Which one of the following processes produces a decrease in the entropy of the system? melting solid…

A: The solid substances have the minimum disorder, hence the entropy of the solid is minimum. The…

Q: For a reaction to be spontaneous, which of the following factors should have a negative sign? a…

A: Given : We have to tell what is requirement for spontaneity of a reaction

Q: The Second Law of Thermodynamics states, the entropy of the universe is always increasing, ∆Suni >…

A: A question about second law of thermodynamics, which is to be accomplished.

Q: Which of the following statements define the second law of thermodynamics? O All spontaneous…

A: Given: Different - different statements. To find : true statement regarding second law of…

Q: If the helium was open to the atmosphere and you heated it from 25°C to 100°C, would the change in…

A: the change in entropy will be larger  than heating it in a sealed box.

Q: Which of the following exhibits a negative entropy change?    A. An ice cube melts on the table…

A: Entropy represent randomness of the particle.As the randomness increase entropy also increase.

Q: When exposed to oxygen, iron forms iron oxide., 4Fe(s) + 3O₂(g) → 2Fe₂O₃(s). What, if anything can…

A: 4Fe(s) + 3O₂(g) → 2Fe₂O₃(s) [ entropy will…

Q: Does the entropy of a star increase or decrease as it radiates? Does the entropy of the space into…

A:

Q: Which statement is true?a. A reaction in which the entropy of the system increases can be…

A: The entropy of a system deals with degree of disorderliness in the system . The spontaneity of a…

Q: Which of the following exhibits negative entropy change? O An ice cube melts on the table. O A lump…

A: The objective of the question is to find out which one of the following is an example of negative…

Q: What is an example of a system showing a decrease in entropy  a. Helium escaping a balloon b.…

A: In this question, we will select the correct statement which showing the Decreasing entropy of the…

Q: Why does the entropy of a gas increase when it expands into a vacuum?

A: Entropy of a system is the measure of the randomness or dis-ordered ness of the system. The entropy…

Q: Increase or decrease in entropy? a. 2NH3 (g)  N2 (g) + 3H2 (g) b. making dry ice from CO2 gas c.…

A:

Q: Define thermodynamically the entropy of a system

A: The second law of thermodynamics helps us to determine the direction in which energy can be…

Q: What general rules apply to predicting whether an entropy change is negative or positive

A: Thermodynamics is the branch of chemistry that mainly deals with the heat transfer between system…

Q: How does the molar entropy of a substance change with increasing temperature?

A: The randomness of the system is measured by the term, called entropy. The entropy of a system is an…

Q: The second law of thermodynamics states that for a process to be spontaneous:         (A) The…

A: According to second law of thermodynamics, the overall entropy of the whole universe is always…

Q: What is the molar entropy of pure oxygen gas at 25 °C?     Greater than zero     Equal to zero…

A:

Q: What is the precise definition of entropy?

A: Entropy is a thermodynamic state function that determines randomness in a system.  When we raise…

Q: What is the energy of system A? 15 What is the energy of system B? 16 9J 8J 6J In how many ways can…

A:

Q: Methanol is burned as fuel in some race cars. This makes it clear that the reaction is spontaneous…

A: According to the second law of thermodynamics, the free energy change of the spontaneous process is…

Q: Predict which member of each of the following pairs has the greater standard entropy at 25°C: (a)…

A: The given options are : (a). C6H6 (l) or C6H6 (g) (b). CO (g) or CO2 (g) (c). 1 mol N2O4 (g) or 2…

Q: 35. List the following in terms of increasing entropy (from lowest to highest), assuming one mole…

A: Since as we know that ;  (In one mole )  Entropy of N2 (g) = 191.61 J/K.mol Entropy of HNO3 (l) =…

Q: Which statement DOES NOT describe the entropy of a system in its molecular state?  Entropy changes…

A: The degree of randomness in a system is measured in terms of entropy. The higher the entropy greater…

Q: Which process results in an entropy change less than 0?

A: Entropy (s) :-  Entropy is a measure of randomness or disorderness present in the system If in a…

Q: What is the change in entropy of 100g of water it is heated from room temperature 20 degree Celsius…

A: Entropy of a system is defined as the disordness or randomness of a system. It is also obtained by…

Q: decreases after the occurrence of a spontaneous change. b. The entropy of any substance at…

A: According to thermodynamics, the entropy of substance measures the randomness or disorder of a…

Q: according to the second law of thermodynamics which of the following statement is true for a…

A: Entropy term is the measure of disorder/randomness. According to second law of thermodynamics system…

Q: Which has lower entropy? CO2(g) or CH4(g)?

A:

Q: What is the sign of the change in entropy of: Heating liquid water to its boiling point

A: Given  sign of the change in entropy of: Heating liquid water to its boiling point

Q: Which of the following substances is likely to have the highest entropy? Link to Physical Constants…

A: The substances given are He, H2, CO2, N2 and H2O (l).

Q: Predict whether the entropy change is greater or less than zero for the following process: dry ice…

A: Determine entropy change on dry ice subliming ---

Q: Consider entropy and its role in determining if chemical and physical processes are spontaneous.…

A: The entropy change shows the "increment or decrement" in randomness. During melting, the phase…

Q: describe the behavior of the entropy of a substance as it changes phase from solid to liquid to gas

A: Increasing order of entropy : Solid < Liquid  < Gas Entropy will increase when solid converts…

Q: Which has higher positional entropy? Gas H2O or Water H2O 100 atm  gas or 1 atm gas

A: Positional entropy:The number of molecular positions or arrangements that a system can have is said…

Q: According to the third law of thermodynamics, at what temperature will entropy become zero? A. 0°…

A: Third law of Thermodynamics- The entropy of a perfectly crystalline solid approaches zero as the…

Q: What is entropy, S, and how is entropy related to spontaneous change?

A: Entropy is defined as,  A measure of randomness or disorder of a system.      OR  The amount of heat…

Q: Which pure substance under standard conditions would have the highest entropy?   O2   HCl   CH3OH…

A: Standard conditions are usually defined as 298 K (25 degrees Celsius) and 1 atm of pressure. Note…

Q: Determine the total entropy change when 15.00 g of ice at –15°C is heated to 75°C. The molar heat of…

A: