Calculate the entropy change when water freezes. Standard state entropy values for water:     H2O (s)     ΔS° = 41 J·mol-1·K-1      H2O (l)     ΔS° = 70 J·mol-1·K-1      H2O (g)     ΔS° = 189 J·mol-1·K-1

Q: Which one has a higher entropy? Explain briefly. MgC2(aq), NaCl(aq)

A: Entropy is a measure of the randomness of the system. The entropy of a system can be calculated by…

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: silicon, Si, the heat of vaporization at its normal boiling point of 2355 °C is 297.1 kJ/mol. The…

A: The question is based on the concept of chemical thermodynamics. we have to calculate entropy of…

Q: than the entropy of amorphous solids. The entropy of crystalline solids is generally O higher O…

A: The correct answer is given below

Q: Which change will result in an overall decrease of entropy? (A) CaCO:(s)→CAO(s) + CO:(g) (B)…

A: Which change will result in an overall decrease of entropy ?

Q: A spontaneous process usually involves an increase in temperature (an exothermic reaction), yet when…

A: Solution- The reaction is favorable when it causes an enthalpy decrease and an increase in system…

Q: ) True or False?  If false, correct the statement.        a) The entropy of a substance increases…

A: The entropy of a substance increases when a substance changes from liquid to vapor at any…

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: 1. The magnitude of any enthalpy change depends on the conditions of temperature, pressure and state…

A: Entropy of a system is the measure of randomness. Higher disorder the system, higher is the entropy.

Q: Arrange the following sets of systems in order of increasing entropy. Assume one mole of each…

A: Entropy is an extensive quantity, which measures the random activity in a particular system. Entropy…

Q: Arrange the following sets of systems in order of increasing entropy. Assume one mole of each…

A: Entropy is a measure of randomness of a system. It is denoted by capital letter 'S' and its value…

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: Predict how the entropy of the substance is affected in each of the processes. Ar(1) → Ar(g) entropy…

A:

Q: he Keq of a reaction is 4 x 10⁻⁷. At equilibrium, the... * reactants are favored…

A: The value of the equilibrium tells us whether the reactants are favored or the products are…

Q: Give an example for each of the following and provide explanation based from what you learned about…

A: Thermodynamics is the study of the relations between heat, work, temperature, and energy. The laws…

Q: Which of the following processes does NOT involve an increase in entropy? Melting of gold nuggets…

A: Entropy is a measure of the randomness of the system. The entropy change in a chemical reaction can…

Q: Determine whether each of the following statements about the thermodynamic functions are True or…

A: The relationship between Gibbs free energy and  Entropy and enthalpy is given by  G = H - TS where G…

Q: Which of the following reactions indicates an increase in entropy?

A: In case of homogeneous gaseous reaction :- if number of gaseous moles of products are more than the…

Q: For the chemical system: KOH + HBr → KBĽ¢ + H,O + 45 kJ (aq) (aq) (1) which of the following is…

A: KOH (s) + HBr (aq) ------> KBr(aq) + H2O(l) +45 kJ

Q: What is the change in entropy in a large mass of water at 50 °C when it receives 155 kJ of energy in…

A: Answer is explained below. Given that, the change is reversible and the mass of water is large…

Q: Which reaction is most likely to have a decrease in entropy? O NaCl(s) → Na*(aq) + Cl(aq) O 2 NH3(g)…

A: When the reaction shows the positive entropy change then the reaction is spontaneous.

Q: Define the concept of Equilibrium Constant and Free Energy Changes ?

A: Thermodynamics is a branch of chemistry that deals with the motion of heat. State functions like…

Q: Which of the following would be expected to have positive entropy change?   Cooling of nitrogen…

A:

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: Which processes are driven by an increase in the entropy of the surroundings? The…

A: For the reversible process total entropy change in 0. So, if the entropy of the surrounding…

Q: Which of the following statements correctly describes the nature of entropy? O Reversible reactions…

A: Applying concept of entropy with the help of law of thermodynamics.

Q: Which process is necessarily driven by an increase in the entropy of the surroundings?

A: firstly we undrstood entrophy  ;Entropy is a measure of the energy dispersal in the system. We see…

Q: 0 Entropy is a measure of the (1) acidity of a sample (2) disorder of a system (3) concentration of…

A: Entropy : It is a thermodynamic quantity. Entropy is a state function. It means that the value of…

Q: which statement about entropy is true? non-spontaneous reactions sometimes will happen all by…

A:

Q: It is the study of the heat or energy involved in physical and chemical changes. Thermodynamics…

A:

Q: Dissolution of ionic compounds generally involves an increase in entropy (+ΔS°), but for a few…

A: entropy is measurement of randomness.As the randomness increase entropy also increase. In…

Q: Consider the following reaction at 25 °C: 5 SO:(g) + 2 NH:(g)→ 2 NO(g) + 5 SO:(g) + 3 H2O(g) If AH°…

A:

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 has lower entropy? CO2(g) or CH4(g)?

A:

Q: Starting from Gibbs free energy get the mathematical equation for the equilibrium temperature.

A: Gibbs free energy gives an idea about whether the reaction is spontaneous or not. There are three…

Q: Which of the following processes shows an increase in entropy of the system? 2NO₂(g) → 2NO(g) +…

A:

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: The entropy change for a reaction is -21.0 J/K. If delta H is -10.0 k]/mol, calculate Keg at 100° C…

A: Given : The entropy change,∆S= -21.0 J/K. The enthalpy change, ∆H= -10.0 kJ/mol=10000 J/mol…

Q: Dissolution of ionic compounds generally involves an increase in entropy (+ΔS°), but for a few…

A: The degree of randomness in atoms or ions or molecules of a compound is considered to be its…

Q: Which process results in the increase in entropy of the universe?

A: Entropy is the randomness or disorderness in a system. The change in entropy is positive when…

Q: Discuss the spontaneity of each process in the following scenarios, based on the use of the Gibbs…

A: Gibb's free energy equation is :  ∆G = ∆H - T∆S  For a spontaneous process ∆G must be negative.

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: When a liquid is converted to a solid, entropy increases. True O False

A: Entropy: Entropy is defined as the thermal energy of the system that is unavailable for doing useful…

Q: The Third Law of Thermodynamics: The entropy of a perfect crystal at zero Kelvin is zero.  True…

A:

Q: 1. The magnitude of any enthalpy change depends on the conditions of temperature, pressure and state…

A: Solutions-

Q: Which of the following statements correctly identifies the Second Law of Thermodynamics? The free…

A: The second law of thermodynamics predicts the spontaneous nature of a process. According to this…

Q: Which statement is true about the relationship between entropy and spontaneity? spontaneous…

A: