What is the change in entropy when 0.125 mol of potassium freezes at 67.2°C (Hfus = 2.39 kJ/mol)?

Q: Why is the standard entropy of a substance in the gas state greater than its standard entropy in the…

A: The intermolecular force between gas molecules is less than the intermolecular force between liquid…

Q: Indicate whether each process produces an increase or decrease in the entropy of the system

A: Given :-  (a) CO2(s) —> CO2(g) (b) CaO (s) + CO2 (g) —> CaCO3 (s)  (c) HCl (g) + NH3 (g) —>…

Q: Hydrochloric acid reacts with sodium hydroxide to form sodium chloride and water. If the change in…

A: Given, HCl is react with NaOH to form NaCl and H2O .  The change in enthalpy is 56.13 KJ and the…

Q: At temperature T0, substance X in its A form (A can be liquid, solid or vapor) has same chemical…

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Q: You add some of the white crystals to a small test tube filled with water. The water in the test…

A: Given : Initial temperature = 250C = 298 K Final temperature = 150C = 288K

Q: Choose the system with the greater entropy in each case:(a) 1 mol of H2(g) at STP or 1 mol of SO2(g)…

A: The give question can be answered by using Boltzmann entropy formula, K is Boltzmann constant. W is…

Q: Which substance would have the greatest standard molar entropy? O N2(g) NO2(g) O N2(1) O NO2(1)

A: Entropy (S): entropy dependence on randomness of a system . For example randomness order…

Q: Which of the following is the best example of a positive change in entropy? O A) The mixing of two…

A: Entropy is the degree of randomness or disorder. If randomness increase then entropy will also…

Q: What can be said about the sign of the entropy when solid NaCl is dissolving in water? What can be…

A:

Q: What is the entropy change (in J/K) of 85 g of steam at 100°C when it condenses to water at the same…

A: At phase transition, the entropy change is defined as the ratio of enthalpy change and temperature…

Q: Which substance would have the smallest standard molar entropy? NO2(g) N2(1) N2(g) NO2(1)

A: Entropy is determined by checking the state of phase . In which state material is available .

Q: Calculate the change in entropy that occurs in the system when 1.00 mole of isopropyl alcohol…

A: Given data Number of mole of isopropyl alcohol : n = 1.00 mole Boiling point of isopropyl alcohol :…

Q: Above what temperature (in ºC) does the reaction with H' of 192 kJ/mol and S’ of 622 J/mol·K become…

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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: In each pair, choose the system that has greater entropy and explain your choice: (a) 1 mol of…

A: Entropy of any substance is defined as the measure of thermal energy of the substance per unit…

Q: Predict whether the entropy change of the system in 2 H2 (g) + O2 (g) —> 2 H2O (l) is positive or…

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Q: What is the change in entropy when 0.200 mol of potassium freezes at 63.7°C (H(fus)=2.39 kJ/mol)?

A: Entropy is a state function and it gives a measure of randomness in a system.Change in entropy is…

Q: Calculate the change in entropy that occurs in the system when 45.8 g of diethyl ether (C4H10O)…

A:

Q: Calculate the change in entropy associated with the production of ammonia from nitrogen and hydrogen…

A: Solution:     Change in entropy is the measure of degree of randomness or disorder in the system. It…

Q: There is a natural tendency for the universe to have increased entropy.

A: Given statement is true or false ?

Q: Which of the following represents an increase in entropy

A: Entropy is defined as degree of disorderness or randomness or unevenness present Entropy is highest…

Q: As a system goes from state A to state B, its entropy decreases. What can you say about the number…

A: Given: Here there is a decrease when the system goes from state A to state B. The objective is to…

Q: Calculate the change in entropy when 15.9 grams of argon (Ar) undergo isothermal compression from…

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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.…

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Q: Observe the Figure 1.0 in which the influence of temperature to change in enthalpy, ∆H and entropy,…

A: Each chemical reaction is associated with a certain amount of energy. This energy can be liberated…

Q: The enthalpy of vaporization of methanol (CH3OH) is 35.3 kJ/mol at the boiling point of 64.2 °C.…

A: The vaporization can be defined as phase transition from liquid phase to vapor phase.

Q: Calculate the change in entropy that occurs in the system when 1.00 mole of isopropyl alcohol…

A: freezing point (T)=-89.5∘C=183.5Kno. of moles(n)   =1.00 molesthe latent heat of fusion of isopropyl…

Q: What is the entropy change when 315 J of energy is reversibly transferred to a sample of water at…

A: Entropy change of a system for reversible process is given by  where ΔS = entropy change  Q = heat…

Q: What is the increase in entropy of 1.00 kg of ice originally at 0 oC that is melted to form water a…

A: Change in entropy is given by: ∆S=∆qT∆S=m×LfT

Q: of the following is the entropy change of the system? B. +7.618 J/K /K C. -4.989 J/K D. +4.9 of the…

A: Given, T = 298 Mole(n) = 1.0 mol Volume (V1) = 2.0 L Final Volume (V2) = 5.0 L Using entropy…

Q: Why does the entropy of halogens at room temperature increases in the following order I2 <Br < Clz.

A: Entropy:  It is the thermodynamic property which measure molecular randomness or disorderness of a…

Q: What is the entropy when a system goes from 4 microstates to 5 microstates? 3.08 x 10-24 O -3.08 x…

A:

Q: Which of the following statements must be true for the entropy of a pure solid to be zero? I. The…

A: Entropy, the measure of a system's thermal energy per unit temperature that is unavailable for doing…

Q: represents the change in entropy for a system going from 142 possible microstates to 830 possible…

A: In Boltzmann's definition the entropy is the total numbers of possible microstates. the Boltzmann's…

Q: What is the difference in entropy between 25 g of N2 at standard conditions and 25 g of N2 at 400 °C…

A: The measure of disorderness in a thermodynamic system is called entropy. The entropy change is given…

Q: Consider a process in which the entropy of a system increases by 125 J K−1 and the entropy of the…

A: Entropy change of the universe is the summation of entropy change of the system and entropy change…

Q: How does the entropy of ice at −5°C diff er, if at all, from its entropy at −50°C?

A: Entropy- Entropy is a thermodynamic property. Entropy determines tendency of process. Tendency means…

Q: Explain why changes in both enthalpy and entropy determine the spontaneity of a process.

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Q: Q.6 The standard enthalpy of combustion of solid urea (CO(NH2)2) is -632 kJ mol at 298 K and its…

A:

Q: Arrange Au(s), Al(s), and C(s) in order of increasing entropy. Assume the three solids are at the…

A: The correct order of entropy is given below

Q: Acetic acid, CH3COOH, freezes at 16.6°C. The heat of fusion,
Hfus, is 69.0 J/g. What is the change…

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Q: Does entropy increase or decrease in the following process? N2 + 3H2 → 2 NH3

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Q: Without doing any calculations or using Sf data, arrange each group in order of increasing entropy.…

A: Always a gaseous (vapor) substance of same material have highest entropy compare to its liquid and…

Q: . Chloroform, CHC13, has a normal boiling point of 61 °C and it enthalpy of vaporization is 29.24…

A: Formula used:- ∆G°=∆H°-T∆S° But in this condition ∆G° = 0  Thus new formula is ∆S° = ∆H°/T

Q: Which of the following results in a decrease in the entropy of the system? Group of answer choices…

A: Since we know that Entropy depends upon on the number of moles of gas molecules on products side and…

Q: Calculate the change in entropy when the pressure of a 55.0 g sample of oxygen gas is increased from…

A: Given- w= 55.0 g Molar mass of O2= 32g/mol P1 =625 mm Hg P2 = 1.24 atm Temperature = 250 C =…