14) Calculate the entropy change for the following reaction given the data below

Question

14) Calculate the entropy change for the following reaction given the data below

N2 + 3 H2 --><-- 2 NH3

SoNH3 = 29.2 J/K,    SoH2= 1.2 J/K,     SoN2 = 4.6 J/K

15) For a unknown reaction at 250K it was found that DHo=-195 J/mol and DS was 10.6 J/K. Calculate DGo

16) The Ka value for acetic acid is 1.75x10-6. What is G for this dissociation at 298K if R=8.314 J K- mol-1?

17). A reaction with 1x10105 microstates was examined. If Boltzmann’s constant is 1.38 x10-23 , what is the entropy, in J per K, of this species?

Explanation / Answer

14)
Srxn = sof (product) - sof (reactant)
=2*So(NH3) - 3*So(H2) - So(N2)
= 2*(29.2) - 3*(1.2) - (4.6)
= 58.4 - 3.6 - 4.6
= 50.2 J/K
Answer: 50.2 J/K

15)
DGo = DHo - T*DSo
= -195 - 250*10.6
= -2845 J/mol

Answer: -2845 J/mol

I am allowed to answer only 1 question at a time

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.