Consider a process which has ΔSuniv > 0 at 25°C. Which of the following statements is/are always true?  I) The process occurs spontaneously at 25°C.  II) The process is endothermic.  III) As temperature increases, the process becomes more spontaneous.

Q: Hydrogen reacts with nitrogen to form ammonia (NH3) according to the following reaction: 3 H2 (g) +…

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Q: For a particular reaction, Δ?=120.5 kJ/mol and Δ?=758.2 J/(mol·K). Calculate Δ? for this reaction at…

A: Given data is  ΔH = 120.5 KJ/mol = 120500 J/mol And ΔS = 758.2 J/mol.K Since ΔG = ΔH - TΔS where T =…

Q: For the reaction2CO(g) + 2NO(g)2CO2(g) + N2(g)ΔH° = -746.6 kJ and ΔS° = -198.0 J/KThe maximum amount…

A: The given balanced equation can be expressed as: Calculate the standard free energy by using the…

Q: The reaction                         2 NO(g)   ⇆  N2O4(g) occurs at 25oC under standard state…

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Q: 2 Ag20(s) → 4 Ag(s) + O2(g) Thermodynamic data are given below. 2 Ag20(s) → 4 Ag(s) + 02(g)…

A: NO, decomposition of silver (I) Oxide is not favored at 25 deg C.

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: What is ΔH° for the following phase change? NaCl(s) → NaCl(l) Substance ΔH°f (kJ/mol) NaCl(s)…

A: Given NaCl(s) → NaCl(l)Substance          ΔH°f (kJ/mol)NaCl(s)               –411.12NaCl(l)…

Q: Consider the following reaction and its associated ΔHrxn. CH3OH=CO+2H2,   ΔHrxn = 90.70 kJ/mol…

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Q: Calculate the ΔSsurr in kJ/K for the following reaction at 50°C. 4 NH3 (g) + 5 O2 (g) → 4 NO (g) + 6…

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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: Nitrogen trioxide dissociation according to the reaction. N2O3(g) = NO2(g) +NO(g) When one mole of…

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Q: Dinitrogen tetroxide (N2O4) decomposes to nitrogen dioxide (NO2). If ΔH° = 58.02 kJ/mol and ΔS° =…

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Q: A reaction will be spontaneous only at low temperatures if both ΔH and ΔS are negative. For a…

A: given: ∆H=-320.1KJ/mol        =-320100J/mol∆S=-95J/K.mol

Q: 2 O3(g) → 3 O2(g) ΔS∘∘ = 137.4 J/K; ΔH∘∘ = −285.4 kJ Calculate ΔG∘∘ at 55°C and determine…

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Q: At what temperature would you expect a reaction to become spontaneous that has ΔH=234 kJ and ΔS=234…

A: Given that, for a given reaction, the enthalpy changes and entropy changes as follows --- Enthalpy…

Q: Predict the major product of the following reaction. ? НО, ОН 1) MeMgBr 2) H + ОН он

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Q: For the reaction C6H6 (l) + 3 H2 (g)  -->  C6H12 (l)        ΔHo = –206.7 kJ/mol What statement is…

A: We know that   ΔGo =  ΔHo - T ΔSo and for a reaction to be spontaneous  ΔGo should be negative.

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: For a particular reaction, ΔH∘=20.1 kJ and ΔS∘=45.9 J/K. Assuming these values change very little…

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Q: Consider the following reaction at constant P. Use the information here to determine the value of…

A: From thermodynamics: ∆Ssurr=∆HT                                                              . . .…

Q: For a reaction   ΔH= -4.7 kJ  and  ΔS= -69.5 J/K at 25 oC.  Determine the ΔG for this reaction

A: The question is solved using Gibbs – Helmoholtz equation.

Q: Consider the following reaction.  Use the information here to determine the value of ΔSsurr at 355…

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Q: Calculate the standard free energy change (kJ/mol) for the reaction shown at a temperature of 298.15…

A: According to the question we have a reaction between the nitrogen gas and oxygen gas which is as…

Q: When 0.783 g of benzoic acid, C7H6O2 (122.12 g/mol) is burned in a bomb calorimeter, the temperature…

A: Given , mass of benzoic acid = 0.783 g

Q: Which reaction(s) will be spontaneous at all temperatures? : 4NH3(g) + O2(g) → 2N2(g) + 6H2O(g) ΔrH…

A: For a chemical reaction to be spontaneous, Gibbs free energy, ∆rG should be negative. ∆rG is…

Q: For the reaction   2 PF5(g) + 5 H2(g) →  2 P(g) + 10 HF(g), calculate ΔGº and determine whether the…

A: Given,

Q: For a given reaction, ΔH = +31.15 kJ/mol and ΔS = +126.83 J/K · mol. Above what temperature is the…

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Q: The reaction                         2 NO(g)   ⇆  N2O4(g) occurs at 25oC under standard state…

A: The equilibrium reaction given in the question is -  2 NO (g)   ⇌  N2O4 (g) Standard Gibbs free…

Q: When 0.851 g of benzoic acid, C7H6O2 (122.12 g/mol) is burned in a bomb calorimeter, the temperature…

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Q: 2 ΔΗ for the vaporization of benzene is 31.0 kJ/mol, and the boiling point (at atm of pressure) is…

A: We have been given that

Q: The ΔHo for the following reaction at 298 K is -36.4 kJ.   1/2 H2(g) + 1/2 Br2(l) →  HBr(g)…

A: The formula is : ΔH = ΔU + Δn(g)RT ΔH = Change in enthalpy ΔU = Change in internal energy R = Gas…

Q: Calculate ΔSsurr at 25°C for the following reaction at constant pressure. Will the reaction be…

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Q: Consider the reaction below for the decomposition of carbon tetrachloride gas:  CCl4(g)    ------>…

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Q: For a given reaction, ΔH∘∘= +35.5 kJ/mol and ΔS∘∘= +83.6 J/(K∙∙ mol). In what temperature range is…

A: From thermodyanamic relations, we have ΔGo = ΔHo - TΔSo      ------(1) For a reaction to be…

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: or a particular reaction, Δ?=−14.20 kJ and Δ?=−198.5 J/K. Calculate Δ? for this reaction at 298 K

A: ∆H = -14.20 kj ∆S  = -198.5 j/k Temprature = 298K 1joule = 0.001 kilojoule -198.5 joule =X X =…

Q: During an energy exchange, a chemical system absorbs energy from its surroundings. What is the sign…

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