If the entropy change for the reaction is ∆Ssys = −308.6 J mol-1 K-1  at 298,15 K,  what value must ∆Hsys have for the reaction to be spontaneous?

Q: Given the following combustion reactions, which will have the most negative molar entropy change?…

A: answer entropy is the degree of randomness  take the gaseous atom only   a. C9H20(l) + 14 O2(g)…

Q: 1)Which substance has the higher entropy?a) dry ice (solid CO2) at –78 OC or CO2(g) at 0 OCb) liquid…

A: 1. CO2(g) at 0oC has higher entropy than dry ice at -78oC, because gas has higher entropy due to its…

Q: ANSWER THE FOLLOWING QUESTIONS: 1. The relationship between entropy and temperature is introduced…

A: Since you have posted multiple questions ,as per guidelines we are subjected to solve one per…

Q: Which of the following statements concerning entropy is/are CORRECT?   1. The entropy of a…

A: The entropy measures the randomness of a system. The entropy of a system will be higher at a higher…

Q: Rank the following substances in order of increasing standard molar entropy. (Please use the numbers…

A: Here, we have to rank the given substances in order of increasing standard molar entropy (S°). Given…

Q: Calculate the change in entropy that occurs in the system when 47.5 g of acetone (C3H6O) vaporizes…

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Q: For ammonia (NH3), the enthalpy of fusion is 5.65 kJ/mol and the entropy of fusion is 28.9 J/K·mol.…

A: Answer- Enthalpy- Enthalpy is the amount of internal energy contained in a compound whereas entropy…

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: For each pair of substances choose the one with the higher standard molar entropy and explain your…

A: a) NaNO3(s); NaNO3(l) NaNO3(l) will have higher standard molar entropy than NaNO3(s) Because in…

Q: The enthalpy of vaporization of methanol (CH30H) is 35.3 kJ/mol at the boiling point of 64.2 °C.…

A: formuls for this is: entropy change = enthalapy of vapourisation/Boilling temp.

Q: For each pair of substances choose the one with the higher standard molar entropy and explain your…

A: The measurement of disorderness is especially done by entropy. Higher the disorderness (randomness),…

Q: Of the following, which system shows a decrease in entropy? A CHJOH (ACH3OH (g) B. NaCI (s- Na (ag)…

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Q: certain substance has an enthalpy of fusion of 4.73 kJ/mol and an entropy of fusion of 21.2 J/mol/K.…

A: We know ∆H=∆S×T ∆H=4730j/mol ∆S=21.2j/mol/k So T=4730÷21.2=223.11k

Q: Which of the following substances exhibits the greatest standard molar entropy, So? Select one: H2…

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

A: Since you have posted multiple questions as per guidelines we can answer only one per session . if…

Q: For each of the pairs of substances listed below, CIRCLE the substance that you expect to have the…

A: Entropy of the substance measure the degree of randomness. Entropy is represent by symbol S. Entropy…

Q: Which one of the following would be expected to have the lowest standard molar entropy, S°, at 25°C?…

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Q: For a reaction that is exothermic and non–spontaneous at 25 oC, which quantity must be positive? A.…

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Q: Which of the following substances has the highest standard molar entropy (S°) at 25°C?     a. .…

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Q: Describe the spontaneity and entropy of the processes. Sublimation of naphthalene balls as…

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Q: Determine whether the change in entropy increases or decreases. 1.Sublimation of naphthalene balls…

A: Entropy is a thermodynamic quantity that measures randomness or disorder. Higher is the entropy…

Q: 1. Which of the following will have the greatest standard molar entropy (S°)? a. Hea b. H2Om c.…

A: The randomness of molecules in scientific terms is called entropy. The molecules that are free to…

Q: VII. Predict the sign of entropy. Write P if it is positive and N for negative. Write your answer on…

A: Since you have posted a question with multiple sub-parts, as per our company guidelines we are…

Q: K (s) + ½Cl, (g) – KCI (s) AH° = – 437 kJ/molpn 14. It is observed that the reaction producing KCl…

A: Given reaction is having formation of KCl from its elementary reactants.

Q: The heat of vaporization of methanol, CH3OH, is 35.20 kJ/mol. Its boiling point is 64.6°C. What is…

A: The change in entropy  for the vaporization of methanol has to be calculated, Given: The heat of…

Q: Which substance will have the highest molar entropy at 25oC?   A. C4H10(g)   B. CO2(s)   C.…

A: Solution: We know that, Molar mass of gas is directly proportional to absolute entropy. In above…

Q: 2. When an isolated system undergoes a reversible process, A. It is isentropic. B. The entropy…

A: There are several types of thermodynamic processes, including (a) isothermal, where the system's…

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

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Q: Calculate the change of the entropy of the system in J/K for the following phase transition:…

A: Given-> Weight of pentanol = 155.1 gm Molar mass of pentanol = 88.15 g/mole Enthalpy of…

Q: Explosive reactions often have a large negative enthalpy change and a large positive entropy change,…

A: In this reaction we get ∆G° is negative so reaction will be favourable. n is the total moles of gas…

Q: Describe the spontaneity and solve entropy of the processes. Sublimation of naphthalene balls as…

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Q: II. Predict and explain why the sign of the change in entropy for the following processes: 1.…

A: Entropy is basically associated with the randomness of the system. If randomness increases entropy…

Q: Two moles of helium and three moles of argon are mixed at the same pressure and temperature. a)…

A: When two or more substances are mixed under normal conditions of temperature and pressure there is a…

Q: For each pair of substances, choose the one that you expect to have the higher standard molar…

A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts for you.…

Q: Arrange these compounds in order of increasing standard molar entropy at 25°C: C3H8(g), C2H4(g),…

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Q: In which of the following processes does the entropy of the system decrease? Select one: H2(g) +…

A: > In a chemical reaction if gaseous moles increases than entropy increase. > for gases if…

Q: Define the term entropy in thermodynamics. (ii)    In what way entropy is related to third law of…

A: ANSWER

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: Which of the following substances has the lowest absolute molar entropy at 25°C?   Group of answer…

A: The substances given are HCl(l), HCl (g), HCl (s), HBr (g) and HI (g).

Q: Given the particulate models here that depict Cu in solid form, Br2 in liquid form, and He in…

A: The Gibb’s equation of thermodynamic purposed a relation between ΔS, ΔH and ΔG with Temperature.…

Q: Which of the following reactions is likely to have the most negative change in entropy? NH3(g) b.…

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Q: Indicate whether each process produces an increase or decrease in the entropy in the system. Please…

A: We have to predict whether we have increase or decrease in the entropy of the system.

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: Which of the following processes will result in an increase in entropy for the system?          (A)…

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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: Two moles of helium and three moles of argon are mixed at the same pressure and temperature. a)…

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Q: the highest molar entropy? a. CH2Cl2 (g) b. NH3 (g) c. N2O5 (s) d. N2H4 (l)

A: Entropy is the randomness of molecules in the given system.

Q: The normal boiling point of ethanol, C,H;OH, is 78.3°C, and its molar enthalpy of vaporization is…

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Q: 11. For which of the following reactions will the entropy of the system decrease? A. 2 NH3(g) …

A: Gas has more entropy than liquid which have more entropy than solid. In the above reaction D. there…