he standard entropy (S°) (J/K.mol) values at 27°C is given below Ag+ 3Bg 4C :S° 135; B: S° = 204; C: S°=73.1) 3Dg+2Eg 5F) :S° 123; E: S° = 191; F: S°=69.1) %3D

Chemistry & Chemical Reactivity
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Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter18: Principles Of Chemical Reactivity: Entropy And Free Energy
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(a) Predict and explain whether the following reaction is spontaneous or not:
The standard entropy (S°) (J/K.mol) values at 27°C is given below.
(i) Ag + 3Bg → 4Ca)
(4: S° 135; B: S° = 204; C: S°=73.1)
(ii) 3Dg+2Eg → 5F
(D: S° = 123; E: S° = 191; F: S°=69.1)
(b) Explain the phenomenon (p-type or n-type) and property and bandgap
change occurring when Germanium is doped with Gallium. Explain the shift
occurring in Fermi level (EF)
%3D
QUeNtIon 1 13 AM
(a) Heat supphed to a Carmot engine is 1985 8 kJ. How much useful work
(w) can be done by the engine if it works between 12 C and 102-C Also
calculate the efficiency?
(b) Give out the cell representation and calculate the emf of the following
cells and predict whether the redox reaction is feasible or not under given
conditions.
a) Zn CuSO4aq(0.5M)→ZnSOaiag(0.01M)-Cus)
(Eza = -0.74V, E°cu=0.31V)
b) Sno+PbSOa(0.4M)>SnSO4((0.013M)+Pb)
(E'sn = 0.16V. E°P = -0.13V)
Transcribed Image Text:(a) Predict and explain whether the following reaction is spontaneous or not: The standard entropy (S°) (J/K.mol) values at 27°C is given below. (i) Ag + 3Bg → 4Ca) (4: S° 135; B: S° = 204; C: S°=73.1) (ii) 3Dg+2Eg → 5F (D: S° = 123; E: S° = 191; F: S°=69.1) (b) Explain the phenomenon (p-type or n-type) and property and bandgap change occurring when Germanium is doped with Gallium. Explain the shift occurring in Fermi level (EF) %3D QUeNtIon 1 13 AM (a) Heat supphed to a Carmot engine is 1985 8 kJ. How much useful work (w) can be done by the engine if it works between 12 C and 102-C Also calculate the efficiency? (b) Give out the cell representation and calculate the emf of the following cells and predict whether the redox reaction is feasible or not under given conditions. a) Zn CuSO4aq(0.5M)→ZnSOaiag(0.01M)-Cus) (Eza = -0.74V, E°cu=0.31V) b) Sno+PbSOa(0.4M)>SnSO4((0.013M)+Pb) (E'sn = 0.16V. E°P = -0.13V)
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