(b) Consider the production of urea with the equation shown below, CO2 (g) + 2 NH3 (g) : H₂NCONH2 (s) + H₂O (1) urea given the following the thermodynamic data at 25°C: Species CO2(g) H₂NCONH2(S) AHof (kJ.mol-¹) -393.51 -333.51 S° (J.K-1.mol-¹) 213.63 104.60 (ii) Calculate AS° NH3(g) -46.11 192.34 (i) Calculate the standard enthalpy change of the forward reaction, AH°, stran universe H₂O(g) -241.82 188.83 for the forward reaction. AS uni = 45 surr& 4S syst H₂O(l) -285.83 69.91 reaction. (iii) Hence, calculate AGº for the forward reaction at 25 °C. Is this reaction spontaneous at this temperature? Explain your answer. (iv) Calculate the equilibrium constant for the forward reaction at 25 °C?

Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Iv
(b) Consider the production of urea with the equation shown below,
CO2 (g) + 2 NH3 (g) ⇒ H₂NCONH2 (s) + H₂O (1)
urea
given the following the thermodynamic data at 25°C:
CO₂(g)
-393.51
213.63
Species
AH°F (kJ.mol-¹)
S° (J.K-1¹.mol-¹)
(ii) Calculate AS°
NH3(g)
-46.11
192.34
universe
H2NCONH2(S)
-333.51
104.60
(i) Calculate the standard enthalpy change of the forward reaction, AH°,
Atran
for the forward reaction.
• AS surr & AS sys Fot
Souni =
H₂O(g)
-241.82
188.83
H₂O(l)
-285.83
69.91
reaction.
(iii) Hence, calculate AG° for the forward reaction at 25 °C. Is this reaction spontaneous
at this temperature? Explain your answer.
(iv) Calculate the equilibrium constant for the forward reaction at 25 °C?
Transcribed Image Text:(b) Consider the production of urea with the equation shown below, CO2 (g) + 2 NH3 (g) ⇒ H₂NCONH2 (s) + H₂O (1) urea given the following the thermodynamic data at 25°C: CO₂(g) -393.51 213.63 Species AH°F (kJ.mol-¹) S° (J.K-1¹.mol-¹) (ii) Calculate AS° NH3(g) -46.11 192.34 universe H2NCONH2(S) -333.51 104.60 (i) Calculate the standard enthalpy change of the forward reaction, AH°, Atran for the forward reaction. • AS surr & AS sys Fot Souni = H₂O(g) -241.82 188.83 H₂O(l) -285.83 69.91 reaction. (iii) Hence, calculate AG° for the forward reaction at 25 °C. Is this reaction spontaneous at this temperature? Explain your answer. (iv) Calculate the equilibrium constant for the forward reaction at 25 °C?
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