CO2 + 2NH3 = NH2C(O)NH2 Assume that for the chemical reaction A+2NH3→ B above ∆H'°= -...
CO2 + 2NH3 = NH2C(O)NH2
Assume that for the chemical reaction A+2NH3→ B above
∆H'°= - 9.5 kJ/mol, ∆S'°= - 61 J/mol K.
Calculate approximate ratio between compounds [B]/[A] at the equilibrium under standard biochemical conditions assuming [NH3]=1M.
A B
Homework Answers
Firstly delta G is calculated by using thermodynamic relation. Then using the condition of equilibrium to find the ratio of concentration of B/A
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CO2 + 2NH3 = NH2C(O)NH2
Assume that for the chemical reaction A+2NH3→ B above
∆H'°= -...
1. The simplest ammonia formation is from nitrogen and hydrogen. Consider the reversible reaction N2(g) + 3H2(g) → 2NH3(g) The standard enthaply and Gibbs free energy of formation one mole NH3 is ∆H◦...
1. The simplest ammonia formation is from nitrogen and hydrogen. Consider the reversible reaction N2(g) + 3H2(g) → 2NH3(g) The standard enthaply and Gibbs free energy of formation one mole NH3 is ∆H◦ m = −46.11 kJ mol−1 and ∆G◦ m = −16.78 kJ mol−1 . (a) What is equilibrium constant at standard condition (25°C and 1 atm)? (b) What is equilibrium constant at 60°C and 1 atm? (c) What is the Gibbs free-energy change relative to that under standard...
→ Fe(s) + CO2(g), AGº is - 5.8 kJ and AH° is -11 kJ. Sº (J...
→ Fe(s) + CO2(g), AGº is - 5.8 kJ and AH° is -11 kJ. Sº (J mol-? K-'); 4. For the reaction Fe(s) + CO(g) Fe (27.3), CO(197.5), CO (213.7) a) What is AS sur? [37 JK-'] b) Use AG to determine whether the reaction is spontaneous or nonspontaneous under standard conditions. Explain. c) Use AS univ to determine whether the reaction is spontaneous or nonspontaneous under standard conditions. Explain. d) What is Sº for FeO? [61 J mol-'K-']
kJ/mole) The standard enthalpy of combustion of solid urea (NH2 (C-O) (C=O)NH2 ) is -632 kJ/mole...
kJ/mole) The standard enthalpy of combustion of solid urea (NH2 (C-O) (C=O)NH2 ) is -632 kJ/mole under standard conditions. Its standard molar entropy is 104.60 J/K mol. Calculate the Gibbs energy of formation of urea at 298K.(ANS: -663 kJ/mol) 4.
Consider the reaction 2NH3(g) + 3N2O(g) 4N2(e) + 3H2O(g) for which AH = -879.5 kJ and...
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Urea (NH2CONH2), an important nitrogen fertilizer, is produced industrially by the following reaction: 2NH3(g)+CO2(g)→...
Urea (NH2CONH2), an important nitrogen fertilizer, is produced industrially by the following reaction: 2NH3(g)+CO2(g)→NH2CONH2(aq)+H2O(l) Given that ΔG∘ = −13.6 kJ/mol, calculate ΔG at 25∘C for the following sets of conditions Part A 50 atm NH3, 50 atm CO2, 4.0 M NH2CONH2 Express the free energy in kilojoules per mole to two significant figures. Part B 8.0×10−2 atm NH3, 8.0×10−2 atm CO2, 1.0 M NH2CONH2 Express the free energy in kilojoules per mole to two significant figures. Part C Is the reaction spontaneous for the conditions in...
The equilibrium constant for the equation Ag+ (aq) + 2NH, (aq) =[Ag(NH),]+(aq) is Kf = 2.5...
The equilibrium constant for the equation Ag+ (aq) + 2NH, (aq) =[Ag(NH),]+(aq) is Kf = 2.5 x 103 M-2 at 25.0 °C. Calculate the value of AGixn at 25.0 °C. C AG = k Is the reaction spontaneous under standard conditions? kJ/mol J/mol no O yes Calculate the value of AGrxn at 25.0 °C when [Ag+] = 0.00138 M, (NH2) = 0.438 M, and [[Ag(NH3)2]+] = 0.00739 M. Is the reaction spontaneous under these conditions? AGrxn = kJ/mol O yes...
A certain reaction has Delta H degree = -22.50 kJ and Delta S degree = -75.50...
A certain reaction has Delta H degree = -22.50 kJ and Delta S degree = -75.50 J/K. Is this reaction exothermic, endothermic or isothermic (neither)? This reaction is Does this reaction lead to a decrease, an increase, or no change in the degree of disorder in the system? This reaction leads to in the disorder of the system. Calculate Delta G degree for this reaction at 298 K. If this value is less than 1 kJ/mol then enter 0 in...
The general form of a chemical reaction is aA + bB = cC +dD Where A...
The general form of a chemical reaction is aA + bB = cC +dD Where A and B are reactants in the forward direction and C and D are products in the forward direction. The lower case letters are the stoichiometric coefficients for the balanced equation. The general form of the equilibrium constant equation is then: Keq = [C]c[D]d/[A]a[B]b Part I: Q vs. K Q: reaction quotient can be calculated for a reaction at any concentration values of reactants and...
Urea (NH2CONH2), an important nitrogen fertilizer, is produced industrially by the reaction 2NH3(g)+CO2(g)→NH2CONH2(aq)+H2O(l) Given that ΔG∘...
Urea (NH2CONH2), an important nitrogen fertilizer, is produced industrially by the reaction 2NH3(g)+CO2(g)→NH2CONH2(aq)+H2O(l) Given that ΔG∘ = -13.6 kJ, calculate ΔG at 25 ∘C for the following sets of conditions. (Figure 1) 1) 20 atm NH3, 20 atm CO2, 4.0 M NH2CONH2 2) 9.0×10−2 atm NH3, 9.0×10−2 atm CO2, 1.0 M NH2CONH2 Is the reaction spontaneous for the conditions in part (a) and/or part (b)? spontaneous for the conditions in part (b), nonspontaneous for the conditions in part (a) nonspontaneous...
4. The gas-phase dehydrogenation of propanol (A) to yield propionaldehyde (B) is in equilibrium at 230°C. Standard thermodynamic data for the reaction species at 298 K are: Propanol: Propionaldehyde...
4. The gas-phase dehydrogenation of propanol (A) to yield propionaldehyde (B) is in equilibrium at 230°C. Standard thermodynamic data for the reaction species at 298 K are: Propanol: Propionaldehyde : H.,--186 k/moi s'u-304.40 J/(mol K) Dihydrogen: H A -256 kJ/molSA 322.49 J/(mol K) Soc 130.68 J/(mol K) ) (4 points) Evaluate the standard enthalpy change of reaction (AH)at 298 K. ii (6 points Calculate the equilibrium constant at 298 K ) (8 points) Determine the equilibrium constant for this reaction...
→ Fe(s) + CO2(g), AGº is - 5.8 kJ and AH° is -11 kJ. Sº (J mol-? K-'); 4. For the reaction Fe(s) + CO(g) Fe (27.3), CO(197.5), CO (213.7) a) What is AS sur? [37 JK-'] b) Use AG to determine whether the reaction is spontaneous or nonspontaneous under standard conditions. Explain. c) Use AS univ to determine whether the reaction is spontaneous or nonspontaneous under standard conditions. Explain. d) What is Sº for FeO? [61 J mol-'K-']
kJ/mole) The standard enthalpy of combustion of solid urea (NH2 (C-O) (C=O)NH2 ) is -632 kJ/mole under standard conditions. Its standard molar entropy is 104.60 J/K mol. Calculate the Gibbs energy of formation of urea at 298K.(ANS: -663 kJ/mol) 4.
Consider the reaction 2NH3(g) + 3N2O(g) 4N2(e) + 3H2O(g) for which AH = -879.5 kJ and AS - 288.1 J/K at 298.15 K. (1) Calculate the entropy change of the UNIVERSE when 2.197 moles of NH3(g) react under standard conditions at 298.15 K. Asuniverse J/K (2) Is this reaction reactant or product favored under standard conditions? (3) If the reaction is product favored, is it enthalpy favored, entropy favored, or favored by both enthalpy and entropy? If the reaction is...
The equilibrium constant for the equation Ag+ (aq) + 2NH, (aq) =[Ag(NH),]+(aq) is Kf = 2.5 x 103 M-2 at 25.0 °C. Calculate the value of AGixn at 25.0 °C. C AG = k Is the reaction spontaneous under standard conditions? kJ/mol J/mol no O yes Calculate the value of AGrxn at 25.0 °C when [Ag+] = 0.00138 M, (NH2) = 0.438 M, and [[Ag(NH3)2]+] = 0.00739 M. Is the reaction spontaneous under these conditions? AGrxn = kJ/mol O yes...
A certain reaction has Delta H degree = -22.50 kJ and Delta S degree = -75.50 J/K. Is this reaction exothermic, endothermic or isothermic (neither)? This reaction is Does this reaction lead to a decrease, an increase, or no change in the degree of disorder in the system? This reaction leads to in the disorder of the system. Calculate Delta G degree for this reaction at 298 K. If this value is less than 1 kJ/mol then enter 0 in...
4. The gas-phase dehydrogenation of propanol (A) to yield propionaldehyde (B) is in equilibrium at 230°C. Standard thermodynamic data for the reaction species at 298 K are: Propanol: Propionaldehyde : H.,--186 k/moi s'u-304.40 J/(mol K) Dihydrogen: H A -256 kJ/molSA 322.49 J/(mol K) Soc 130.68 J/(mol K) ) (4 points) Evaluate the standard enthalpy change of reaction (AH)at 298 K. ii (6 points Calculate the equilibrium constant at 298 K ) (8 points) Determine the equilibrium constant for this reaction...
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