For a reaction, ΔHrxn = -107 kJ and ΔSrxn = 285 J>K. At what temperature is the change in entropy for this reaction equal to the change in entropy for the surroundings?

Q: Determine the entropy of * H₂(g) + Br2(g) → 2HBr (g)

A: Entropy measures the extent of the randomness of a system. It is represented by S. It increases with…

Q: The entropy change ΔS for a phase transition equals ΔH/T, where ΔH is the enthalpy change. Why is it…

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Q: A reaction has ΔH∘rxn= -134 kJ and ΔS∘rxn= 320 J/K.  At what temperature is the change in entropy…

A: Given: -ΔH°rxn = -134 KJΔS°rxn = 320 J/KIf everything is carried out at a constant temperature and…

Q: If enthalpy is +220 kJ for a reaction and entropy is +120 J, at what temperature is this…

A: The spontaniety of any reaction is decided by the Gibb's free energy change if the reaction. Any…

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: HNO2(aq) + OH (aq) H20(1) + NO2 (aq) K= 4.5×1010 What is the standard change in Gibbs free energy at…

A: Given :- K = 4.5 × 1010                T = 25 °C                 R = 8.314 J/K.mol  To calculate :-…

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: Which process is necessarily driven by an increase in the entropyof the surroundings?a. the…

A: Entropy is defined as the measure of disorderliness in the system. The formula for the entropy of…

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: What is the entropy change when 307 J of energy is reversibly transferred to a sample of water at…

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Q: The heat of vaporization of carbon disulfide, CS2, at 25 C is 27.2 Kj/mol. What is the entrophy…

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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: 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: A reaction has ΔH °rxn = -112 kJ and ΔS °rxn = 354 J/K. At what temperature is the change in entropy…

A: The quantity of energy that is absorbed inside the system at a given temperature during a particular…

Q: What is the value of Gibbs free energy when enthalpy is -22kJ/mol and entropy id -54 J/mol.K at 280…

A: Using Gibb's Helmholtz equation: ∆G = ∆H - T∆S Given data :  ∆H = -22kJ/mol  ∆S = -54Jmol-1K-1  T =…

Q: For which of the following reactions will the entropy of the system decrease? CaCO3(s) → CaO(s) +…

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

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Q: For the decomposition of mercury(II) oxide, HgO, to mercury and oxygen: 2HgO(s) → 2Hg(l) + O2(g)…

A: Standard entropy change is the difference of standard entropy of product from standard entropy of…

Q: Suppose a compound could point in any of three directions in the solid and still have the same…

A: • This problem is based upon the third law of thermodynamics.  • This law can be given as, Total…

Q: Enter your answer in the provided box. Calculate the standard entropy change for the following…

A: Using the table of standard entropies of reactants and products, the standard entropy change for the…

Q: If the change in enthalpy is 60.2 kj/mol and the change in entropy is -4 j/mol k at 45 degrees…

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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: What is the chemical significance of a negative enthalpy change and a negative entropy change?

A: Enthalpy change is nothing but the amount of heat evolved or absorbed during a chemical reaction at…

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: 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: Determine the entropy of * NH₂Cl(s) → NH3(g) + HCl(g) > positive negative

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Q: the decomposition of ammonia to nitrogen and hydrogen gas. Substance S° (J/mol · K) H2(g) 130.7…

A: Entropy measures the randomness of the molecule. Gaseous molecule have higher entropy than liquid…

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: Suppose 20 g of ice at 0 °C is added to 300 g of water at 60 °C . What is the total change in…

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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: If a process is exothermic, does the entropy of the surroundings (a) alwaysincrease, (b) always…

A: Entropy is a measure of randomness or disorder. Spontaneous changes always go from a more ordered…

Q: For the reaction 2 CO (g) + O2 (g) → 2 CO2 (g), the entropy change is expected to be negative. Is…

A: The given chemical reaction is as follows: 2CO (g) + O2 (g) → 2CO2 (g) The stoichiometry of the…

Q: A reaction has ∆H=+19.8 kJ and ∆S=+95.3 J/K at 298K.  Calculate the temperature in Kelvin that the…

A: Given information:  ∆H=+19.8 kJ ∆S=+95.3 J/K  T = 298 K ∆G = ? We have to find out ∆G from the given…

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: The amount of energy available in a reaction to do work is known as: a. Entropy b. Enthalpy c.…

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Q: (Q66). What is the change in entropy (in J/K) when 16.9 g of liquid hexane boils at its normal…

A: we need to calculate the change in entropy for hexane

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: How do enthalpy and entropy relate to each other? If enthalpy is negative, does that mean that…

A: To measure spontaneity, both the terms, enthalpy and entropy, cannot be used individually that is…

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

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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: Calculate the change in Gibbs free energy for each of the following sets of ΔH∘rxn , ΔS∘rxn , and T.…

A: ΔG∘ = ΔH∘ - TΔS∘

Q: Consider the decomposition of dinitrogen tetroxide, N2O4, into nitrogen dioxide, NO2.  N2O4…

A: The balanced reaction given is, => N2O4 (g) → 2 NO2 (g) The thermodynamic data given is,…

Q: The ethyl alcohol vaporizes at 78 degrees Celcius, what is the change in entropy if 0.25 kg…

A: Solution - According to the question - Given - Change in entropy = ? S = ? H / T ? H = Heat change…

Q: In a certain spontaneous process, the system undergoes an entropy change of 4.2 J>K; therefore,…

A: For a spontaneous process, the entropy of a system is less than the entropy of surroundings.

Q: A reaction has AH = -112 kJ and ASan = 354 J/K. At what temperature is the change in entropy for the…

A: The given data contains, ∆H°reaction=-112 kJ∆S°reaction=354 J/K

Q: Suppose we redefine the standard state as P = 2 atm. Find the new standard  values of each…

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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: Determine the entropy of * H2(g) + Cl2(g) → 2HCl (g) positive negative

A: Entropy is determined by change in entropy on going from reactant to product. Entropy change=…

Q: (Q66). What is the change in entropy (in J/K) when 14.1 g of liquid hexane boils at its normal…

A: ∆Suniverse = ∆Ssystem + ∆Ssurrounding . And ∆Ssurrounding = - ∆Hreaction / T.