Mocdisonttarper S. Single Correct- hydtrogen in ted tcass points the Process is
ID: 592940 • Letter: M
Question
Mocdisonttarper S. Single Correct- hydtrogen in ted tcass points the Process is the major industrial use of t was discussed in class that the Haber in the production of ammonia Species 193 Use the tabular data above to answer the following and place the letter corresponding to the answer in the blank provided. Show all work. Calculate AH for the Haber process reaction at 25°c. A 92.Ok B. 10.580 kJ C. -121.315 D. 21.865 kJ E. 155, 170 kJ calculate dS for the Haber process reaction at 25°C. A. 809.09 J/K B. 89.39 J/K C. 453.78 J/K D. 199.00 J/K E. 1164.40 J/K -calculate G. for the Haber process reaction at 25°C. A. -33x105 kJ B. 98.7 kJ C. -33 kJ D. 35 kJ E. 0 Is the reaction spontaneous at standard conditions? A. Yes B. No At what temperature is the reaction spontaneous at standard conditions, assuming changes in enthalpy and entropy change do not depend upon temperature. A. At T 460 K C. At T 298 K At T = 0 K D.Explanation / Answer
a)
HRXN = Hproducts - Hreactants
HRXN = 2NH3 - (3H2 + N2)
HRXN = 2*-46 - (3*0 + 0)
HRXN = -92 kJ/mol
b)
dS = 2NH3 - (3H2 + N2)
dS = 2*193- (3*131+192)
dS = -199
c)
dG =2NH3 - (3H2 + N2)
dG = 2*-17 = -34 kJ/mol
d)
dG = < 0
dH - T*dS
-92000< T *-199
T < 92000/199
T < 460