One mole of an ideal gas at 298 K expands isothermally from 1.0 L to 2.0 L (a) reversibly and (b) against a constant external pressure of 12.2 atm.  Calculate the values of ΔSsys, ΔSsurr, and ΔSuniv in both cases. Are your results consistent with the nature of the processes?

Q: A) CaSO:(s) B) C(diamond) C) Xe(g) D) Cso(s) E) Br2(1)

A: Option B is correct answer. B. C ( diamond)

Q: A reactions has ΔH°298 = 100 kJ/mol and ΔS°298 = 250 J/mol·K. Is the reaction spontaneous at room…

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Q: Use the table of standard entropies below to calculate the entropy of the following reaction in…

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Q: How does temperature effect spontaneity? Under what conditions is enthalpy the dominant…

A: We know that, ΔG = ΔH - TΔS For a reaction to be spontaneous ΔG must be negative in sign ΔG < 0 ,…

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: At what temperatures will a reaction be spontaneous if ΔrH° = +62.4 kJ and ΔrS° = +301 J/K?

A: The given values are: ∆rH°=+62.4 kJ=62400 J ∆rS° =+301 J K-1 For a reaction, the relation between…

Q: Given ΔHrxn∘= −135 kJ, ΔS∘rxn= −263 J/K, & T= 299 K, will the reaction be spontaneous?

A: Given: ΔHrxn∘= −135 kJ ΔS∘rxn= −263 J/K T= 299 K To find: Whether the reaction is spontaneous

Q: Does someone know the standard entropy values in J/K for H2(g), F2(g) and HF(g)?

A: The standard entropy values of hydrogen and fluorine gases are 130.6 J/Kmol and 202.8 J/Kmol…

Q: Which of the following statements regarding the Law of Thermodynamics is false? The entropy of the…

A: Thermodynamics studies the relation between heat, work, temperature, and energy. The laws of…

Q: Calculate the change in molar entropy when hydrogen gas is heated from 20°C to 30°C at constant…

A: Entropy change of the system is a state function. The change in entropy is the sum of the change in…

Q: At 25°C, a reaction undergoes an enthalpy change of −27.0 kJ mol^−1 and an entropy change of 27.0 J…

A: Enthalpy change (∆H) = -27.0 KJ mol-1 ...Or because 1KJ = 1000 J    .....so, -27.0 KJ mol-1 × (1000…

Q: Determine the entropy difference between solid and liquid states for a substance melting at 100 °C…

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Q: (a) Can endothermic chemical reactions be spontaneous?(b) Can a process be spontaneous at one…

A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: Which of the following has the largest standard molar entropy, S° (298.15 K)? О а. Н2 (g) O b. NaCI…

A: Answer  The substance in gases state has higher entropy compared to…

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: 3. (2) Does the entropy of the surroundings always increase for spontaneous processes? Explain. (b)…

A: The entropy is a measure of randomness of a system. In a spontaneous process, the entropy of the…

Q: Place the following in order of  increasing molar entropy at 298 K.  CO,    C 5H 12 ,    H 2

A: Given CO C5H12 H2 Arrange them in order of increasing molar entropy = To be determined

Q: 8. Predict the sign of the change in entropy for the condensation of steam to liquid water. 9.…

A: Entropy means randomness. The higher the randomness of the system, the higher will be its entropy.…

Q: The entropy of a crystal containing one mole of identical molecules was measured to be 9.134 J/K at…

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Q: What are the signs of ΔH, ΔS, and ΔG for the spontaneous condensation of a vapor to a liquid?…

A: The reactions that occur on their own and do not need any external help for the reaction to take…

Q: Consider the general reaction at 29 degrees C: 2 A + 1 B → 3 C + 3 D ΔH reaction = -2,079 kJ…

A: The change in entropy of a system at a constant temperature and constant pressure is given as:…

Q: Use the data given here to calculate the values of AGixn at 25 °C for the Compound AG; (kJ/mol)…

A: The reaction taking place is given as, => A + B ----> C

Q: Calculate the entropy change when Argon at 25 oC and 1 atm pressure in a container of volume 500 cm3…

A: The entropy change will be 6.743 J mol-1 K-1.

Q: What is the precise definition of entropy? What is the significance of entropy being a state…

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

Q: Consider the following reaction at room temperature:                         Co(s) + Fe2+(aq, 1.94…

A: The above Nernst equation could be simplified as, Ecell=E°cell-0.0592VnlogQ

Q: Determine the entropy change for the combustion of gaseous propane, C3H8, under standard state…

A: Thermodynamics is the branch of chemistry which deals with the study of heat and other forms of…

Q: Which of the following processes are spontaneous and which are nonspontaneous:formation of CH4 and…

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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: Suppose that a house and its exterior are both initially at 31 °C. Sometime after the air…

A: Spontaneous process is one which proceeds on its own and does not require any external assistance.…

Q: Determine the entropy change for the combustion of gaseous propane, C3Hg, under the standard…

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Q: For a reaction in which ∆H = 76.2 kJ/mol and ∆S = 422 J/K mol, determine the temperature, in °C,…

A: We have the equation for Gibbs free energy as, ∆G = ∆H-T∆S Where, ∆G = change in Gibbs energy ∆H =…

Q: Which law states that the entropy of a perfect crystalline substance is zero at the absolute zero of…

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Q: Standard molar entropies for CO(g), CO2(g), and O2(g) are 197.9, 214.0, and 205.0 in J/mol K,…

A: Entropy Entropy is the measure of disorder in a reaction. When an amount of energy is added to a…

Q: The entropy change for the reaction of 2.17 moles of H20(1) at this temperature would be J/K.

A: For a spontaneous reaction, the change in Gibbs free energy is negative. But, here for the given…

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: Using the standard molar entropies in Appendix C, calculate the standard entropy change,ASº, for the…

A: The balanced chemical reaction given is  Al2O3 (s) + 3 H2 (g) → 2 Al (s) + 3 H2O (g) The standard…

Q: Under standard conditions, the products of a reaction have, overall, greater entropy than the…

A: Given that ∆S°products is greater than ∆S°reactants .

Q: Under what circumstance can the entropy of a system decrease for a spontaneous process?

A: Entropy measures the degree of randomness in the system. When a substance changes its phase solid to…

Q: Place the following in order of  increasing molar entropy at 298 K.  CO  ,   C 5H 12 ,    H 2

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Q: Is the formation of ozone (O3(g)) from oxygen (O2(g)) spontaneous at room temperature under standard…

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

Q: Using the provided data, determine the temperatures at which the following hypothetical reaction…

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Q: Why do exothermic processes tend to be spontaneous at low temperatures? Why does their tendency…

A: According to second law of thermodynamics,

Q: For a given reaction, dH = 32 kJ/mol and dS = 117 J/mol. At approximately what temperature would…

A: The spontaneity of the reaction can be determined by the change in Gibbs free energy. The relation…

Q: For a particular chemical reaction H = 6.8 kJ and S = –29 J/K. Under what temperature condition is…

A: The Gibbs free energy change for a reaction is negative for a spontaneous reaction and is zero for a…

Q: Indicate whether each statement is true or false. CO21g2 and Ar(g) have nearly the same molar mass.…

A: The degrees of freedom of rotational and vibrational motion are directly proportional to the number…

Q: Given the values of ΔH and ΔS, which of the following changes will be spontaneous at constant T and…

A: Given :  ΔH = 125 kJ ΔS = 15.0 J/K T = 300. K

Q: 1. From the values of AH and AS, predict which of the following reactions would be spontaneous at…

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