Part A An object at 20∘C absorbs 25.0 J of heat. What is the change in entropy ΔS of the object?

Q: Calculate the entropy change of the universe (J/mol-K) when the entropy change of the system is 75.4…

A:

Q: methanol, CH3OH, vaporizes at 25°C is 35.4 kJ/mol. What is the entropy change (in J/K) when one mole…

A: Given,   □Hvap = 35.4 kJ/mol T = 25 °c = 298 K □S = □H/T   = 35.4 ×1000/298 = 118.79 J/K-mol

Q: At 25°C, the formation of ammonia from its elements results in a decrease in entropy (∆SRXN = -197…

A: According to the question about the formation of ammonia we have, The Change (decrease) in the…

Q: A chemical reaction has a enthalpy change of 171.8kJ and change in entropy of 788.3 J/K. what is the…

A: For spontaneous reaction ∆G<0 , For non-spontaneous reaction ∆G>0 Where ∆G is change in Gibbs…

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

A: Spontaneous Reactions: The reactions that occur spontaneously i.e without any addition of external…

Q: a) For the vaporization of a liquid at its boiling point, A(l) → A(g), is the entropy change of the…

A: The entropy tells the randomness present in the system due to its disorderness created in the system…

Q: Two systems, each composed of two particles represented by circles, have 20 J of total energy. Which…

A: The system which has greater entropy has to be given and the reason has to be explained.

Q: At 25°C, the formation of ammonia from its elements results in a decrease in entropy (∆SRXN = -197…

A: we have to calculate the value of ∆SUNIV

Q: the

A: Dear student I have given answer to your question in the image format.

Q: For a particular reaction, Δ?=139.99 kJ and Δ?=298.7 J/K. Calculate Δ? for this reaction at 298 K.…

A: Given,  ∆H = 139.99 KJ ∆S = 298.7 J / K T = 298 K.

Q: 46. Which of the following involves a decrease in entropy? A) the sublimation of solid CO2 into CO2…

A: The correct answer about entropy is given below

Q: Which of the following cases has a decrease in entropy? Vaporization of water. Formation of H20 (g)…

A: The disorderness of the system is called as entropy. It is expressed by S . The standard entropy at…

Q: For the reaction below AH = +92.2 kJ, and AS = +198.7 J/K. Estimate the temperature at which this…

A: To find the temperature.

Q: A certain liquid substance boils at 84.7 °C (at 1 atm) and has a standard enthalpy of vaporization…

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Q: At what temperature does the following reaction become spontaneous?  Is it spontaneous below this…

A: Given that delta S is -144.7J/K and the value of delta H is -1152 kJ. Since both values are…

Q: For a particular reaction, Δ?∘=−28.4 kJ/mol and Δ?∘=−87.9 J/(mol⋅K). Assuming these values change…

A: Given: ΔHo = -28.4 KJ/mol = -28400 J/mol. And the value of ΔSo = -87.9 J/mol.K.

Q: Calculate the entropy change of the universe (J/mol-K) when the entropy change of the system is 38.4…

A: Given the entropy change of the system, ∆Ssystem = 38.4 J/mol-K

Q: In a typical cold pack (used for sports injuries), a salt such as ammonium nitrate is kept in a…

A: Dissolution of ammonium nitrate in water is given by, NH4NO3(s)→H2O(l) NH4+(aq)+NO3-(aq)   ∆H=+25.09…

Q: A reaction has ΔH∘rxn= -139 kJ and ΔS∘rxn=303 J/K .     Part A At what temperature is the change in…

A: GIven: ΔH∘rxn= -139 kJ=-13900 J ΔS∘rxn=303 J/K . Now, ∆Ssurrounding = ∆Hreaction / T

Q: ΔEsys

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Q: An example of a reaction where ∆G = 0 is   C(graphite)→C(diamond)   any synthesis reaction…

A: We know, The value of  ∆G = 0 when the reaction is at an equilibrium.

Q: Phase transitions must be included when considering entropy What is the final temperature when 5.20…

A: The objective of the question is to find the final temperature when ice is added to water and the…

Q: The standard enthalpy change and standard entropy change for the reaction are: A,HP = -666.2 kJ…

A: The spontaneous nature of the reaction is determined by calculating the change of free energy of the…

Q: A certain liquid substance boils at 53.3 °C (at 1 atm) and has a standard enthalpy of vaporization…

A: The boiling point of the given substance is = 53.3oC = 53.3oC+273.15 = 326.45 K The standard…

Q: For the reaction 2 NH3 (g) --> N2 (g)+ 3 H2 (g) , ∆H = +92 kJ. Which of the following is true?…

A: The given reaction is,  2 NH3 (g) --> N2 (g)+ 3 H2 (g) , ∆H = +92 kJ ∆H is positive, that means…

Q: Use standard heats of formation (ΔHo) and standard entropies (ΔSo) to calculate ΔGo for the…

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Q: What is the entropy change (in J/K) when 43.3 g of liquid sulfur at its melting temperature of…

A: Answer:Entropy is the measure of system's disorderliness or randomness. In more possible microstates…

Q: What is the entropy change, in J mol-1 K-1, when 100.0 g of water boils at 100.0 oC?…

A: ∆Hvap= 40.7 kJ/mol = 40.7 × 1000 J/mol Water boils at 100°C = 373 K For the vapourization of water,…

Q: When 10.00 grams of NH4CN (s) is dissolved in 120.0 grams of water inside a perfect calorimeter, the…

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Q: The standard enthalpy of vaporization of a liquid is 20.7 kJ/mol at the liquid's normal boiling…

A: Given, dHv° = 20.7 kJ/mol = 20.7 x 1000 J/mol Tb = (52.4 + 273.15 K) = 325.55 K To calculate the…

Q: N2 (g) + 3H2 (g) → 2NH3 (g)   b Ag+ (aq) + Cl- (aq) → AgCl (s)   c CaO (s) + CO2 (g) → CaCO3 (s)…

A: In the above reaction  standard molar entropy of Gas is highert thanLiquids

Q: Suppose that two systems, each composed of two particles repre- sented by circles, have 20 J of…

A: Given data: Two systems, each compound of two particles, represented by the circkes have 20 J of…

Q: Given ΔHrxn = -98.9 kJ and ΔSrxn = - 94.0 J/K at 25 oC for the combination reaction of sulfur…

A: Answer:- This question is answered by using the simple concept of calculation of Standard Gibbs free…

Q: What is the change of entropy in the vaporization of 5 grams of ice cube at 0C to steam at 100 C.…

A: The degree of randomness of the system is called entropy. Specific heat capacity of water(c)=…

Q: For a particular reaction, Δ?∘=67.7 kJ/mol and Δ?∘=126.9 J/(mol⋅K). Assuming these values change…

A: Given : ΔHo of reaction = 67.7 KJ/mol = 67700 J/mol…

Q: true? Select one: Exothermic processes decrease the entropy of the surroundings. The standard molar…

A: We will pick Correct statement

Q: Classify each statement as true or false.

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Q: The enthalpy change (ΔHrxn) for a certain reaction is 700.0 kJ/mol.  The same reaction has an…

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Q: ΔEsys = -341 J? The system is losing 341 J, while the surroundings are gaining 341 J. Both the…

A: Given: Case 1 :  ∆Esystem = -341 J  Case 2 : ∆Esystem = 411 J