“Thermite” reactions have been used for welding metal parts such as railway rails and in metal refining. One such thermite reaction is Fe2 O3(s) + 2Al(s) ⟶ Al2 O3(s) + 2Fe(s). Is the reaction spontaneous at room temperature under standard conditions? During the reaction, the surroundings absorb 851.8 kJ/mol of heat.

Q: For the process: Z₂(g) →2 Z(g), AH° = +478 kJ. What would be predicted for the sign of ASxn and the…

A: Given reaction: Z2(g) → 2Z(g),     ∆H∘ = +478 kJ We have to find the sign of ∆Srxn and the…

Q: H2 reacts with the halogens (X2) according to the reaction: (8)=x + (8)*H 2 HX(8) where X2 can be…

A: According to the second law of thermodynamics, the Spontaneity of a reaction can be determined by…

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: 2.2.Predict if the following reaction is spontaneous or not. CO,6)CO(g) at 25°C 2.3. If the door of…

A: Carnot engine is a heat engine which operates in a reversible cyclic path.

Q: For each reaction, calculate AHrn, ASn, and AGxn at 25 °C and state whether or not the reaction is…

A: a. The reaction: N₂O₄(g) → 2 NO₂(g) Standard enthalpies of formation: N₂O₄(g): Hf =…

Q: An ice cube at 0 Celcius melts when placed inside a room at 22 Celcius. Based on the concepts of…

A: Melting of ice requires energy to melt. So it is an endothermic process. The process in which energy…

Q: Given the chemical reaction:  2 NO2 (g) → N2O4 (g) where ΔH∘∘ = −57.2 kJ/mol and ΔS∘∘ = −176…

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Q: For each reaction, calculate ΔH °rxn, ΔS°rxn, and ΔG°rxn at 25 °C and state whether or not the…

A: Standard heat of formation of N2O4 (ΔHfo) = 9.16 KJ/mol. Standard heat of formation of NO2 (ΔHfo) =…

Q: Calculate how much heat (in kilojoules) a hand warmer containing 23.0 g of iron powder produces.

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Q: 1. Classify the following processes as "Spontaneous" or "Non-spontaneous": (i) (ii) (iii) (iv) (v)…

A: Spontaneous process is the type of  random process is one that takes place alone and has no external…

Q: 3. Consider the dissolution of NH,NO, in a chemical cold pack a. Is the process spontaneous? b. Is…

A: Those reaction in which energy is absorbed are known as the endothermic reactions while the…

Q: Is the following reaction spontaneous at room temperature (25.0 °C) ? 2 H2S(g) + 3 O2(g) 2 SO2(g) +…

A: Interpretation: The given reaction is spontaneous at room temperature or not is to be determined. At…

Q: The following reaction for the formation of glucose from carbon dioxide and water:…

A: The given reaction is,

Q: If a particular reaction has   ΔrH = +30 kJ mol–1    and    ΔrS = –60 J K–1mol–1, when do you expect…

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Q: If a chemical reaction is exothermic, but not spontaneous, which of the following must be true? AG v…

A: Here, we have to assign the sign of all thermodynamic properties.

Q: 8. A reaction has AH° = 100 kJ/mol and AS°=250 J/mol-K. Is the reaction spontaneous at room…

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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: For the reaction C2H6 (g) → C2H4 (g) + H2 (g) ΔH° is +137 kJ/mol and ΔS° is +120 J/K ∙ mol. This…

A: Given, The balanced chemical equation, C2H6 (g) → C2H4 (g) + H2 (g) ΔH°=+137 kJ = 137000 J, and ΔS°…

Q: Consider the following reaction: CH3OH(g) --> HCHO(g) + H2(g); DHo = 85 kJ (2)…

A: As this reaction is endothermic in nature as Del H is positive

Q: If the Delta*H = 135kJ / m * ol and AS 92 J/K mol, at what temperature does this reaction become…

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Q: Which of the following statements is true? Select one: The number of microstates,W, is the number of…

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Q: For the process O2(g)      2O(g), ΔH° = 498 kJ·mol –1.  What would be the predicted sign of ΔS°rxn…

A: Given that :Reaction = O2(g) → 2O(g) ∆H° = 498kJ/mol

Q: For chemical reactions, the change in Gibbs free energy [at 298 K, 1at., ∆G°] determines whether a…

A: The given thermochemical equation is: C(s) + O2 (g) -----> CO2 (g) ;  ∆Go = - 394 kJ For the…

Q: The element oxygen was prepared by Joseph Priestley in 1774 by heating mercury(II) oxide: HgO(s) →…

A: Given chemical equation:  HgO(s) ------> Hg(l) + 1/2O2(g) For a reaction to be spontaneous,…

Q: For a particular reaction, AH = -32 kJ and AS = -98 J/K. Assume that AH and AS do not vary with…

A: As we know that a spontaneous process is one that happens without the addition of external energy. A…

Q: Consider the following reaction: 2 AB2 (g) ⟶ 2 AB(g) + B2(g)           ΔHo= +480.0 kJ/mol a.) Do…

A: Given Chemical Reaction is -  2 AB2 (g) ⟶ 2 AB(g) + B2(g)           ΔH° = +480.0 kJ/mol  Here the…

Q: 4. According to the 2 law of thermodynamics, ASi must be positive for a process to be spontaneous.…

A: SYSTEM: System is that part of universe which we are experimenting on or which we are considering.…

Q: Consider the following chemical reaction for the formation of nitrogen dioxide:2 NO(g) + O₂(g) → 2…

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Q: Briefly describe the Third Law of Thermodynamics.   b) Consider the reaction 2X(g)+ O2(g)→3Y(g)…

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

Q: Determine whether the following process are spontaneous or non-spontaneous. Write your answers on…

A: Since you have posted a question with multiple subparts, we will solve only first three subparts for…

Q: For a particular reaction, AH° = 20.1 kJ/mol and AS° = 45.9 J/(mol·K). Assuming these values change…

A: Answer:- This question is answered by using the simple concept of spontaneity of the reaction which…

Q: Which of the following processes is both exothermic (at 1 atm) and spontaneous? A) Sublimation of…

A: The process which is both exothermic and spontaneous is condensation of water at 99.5°C.

Q: Calculate the temperature, in Kelvins, at which the decomposition of calcium carbonate becomes…

A: Given:The reaction is

Q: In which case will a chemical reaction ALWAYS proceed spontaneously at all temperatures (DH and DS…

A: Feasibility of a reaction depends on the change in Gibbs free energy ∆G.  The value of change in…

Q: 4. The entropy change for the process H2O(s) → H2O(1) is 22.1 J/K and requires that that…

A: Given:  ∆Ssystem = 22.1 J/K  qsystem = -qsurrounding = 6.0 KJ = 6000 J  Temperature (T) = 10°C = 283…

Q: Given the data below, calculate the temperature at which the reaction becomes spontaneous: N2 (g) +…

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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: For each reaction with ΔH = + 245 kJ/mol and ΔS = + 48 J/molK ,at what temperature at which the…

A: The question is based on the concept chemical thermodynamics.   We have been given entropy &…

Q: In photosynthesis, plants form glucose (C6H12O6) and oxygen from carbon dioxide and water. Write a…

A: Photosynthesis It is a process in which green plants make their own food and convert light energy…

Q: A certain reaction is spontaneous at 65 ° C. If the enthalpy change for the reaction is  15…

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Q: Consider the reaction for the decomposition of carbon tetrachloride gas:CCl4(g)¡C(s, graphite) + 2…

A: (a) The given reaction is, CCl4g→Cs,graphite+2Cl2g ∆H=+95.7 kJ∆S=+142.2 J/KT=25°C=25+273K=298 K

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: Calculate the standard molar entropy change for the conversion of nitrogen monoxide to nitrogen…

A: 2 NO + O2 ==> 2NO2

Q: A reaction has standard DS = 50.4 J/K and standard DH = 23.7 kJ. At how many of the following…

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Q: For the process O2(g)      2O(g), ΔH° = 498 kJ·mol –1.  What would be the predicted sign of ΔS°rxn…

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Q: A certain reaction has ∆H ° = +23.7 kJ and ∆S° = +52.4 J>K. Is the reaction spontaneous at 298 K…

A: Entropy is the measure of disorderness or randomness of a system. The standard value of entropy can…

Q: Consider the following reaction: CaCO 3(s) CaO (g) +CO 2(g) For this reaction, delta S = +158.9…

A: For a spontaneous reaction, deltaG should be negative. From the given delta H and delta S values,…

Q: The enthalpy and entropy changes for a reaction at 298 K are ∆H = 46 kJ and ∆S = 190 J/K. Which of…

A: Spontaneity of any reaction is defined by the value of ΔG of the reaction. The reaction will be…

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

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