A particular reaction has G = –350kJ and S = –350J/K. Which of the following can
ID: 938749 • Letter: A
Question
A particular reaction has G = –350kJ and S = –350J/K.
Which of the following can be said about this reaction at 25ºC?
a.heat produced is less than the work produced because some of the heat cannot be converted to work
b.heat produced is less than the work produced, because some of the work cannot be converted to heat
c.work produced is less than the heat produced, because some of the heat cannot be converted to work
d. work produced is less than the heat produced, because some of the work cannot be converted to heat
Explanation / Answer
G = H - TS
G = H - 298*S
-350000 = H - 298*(-350)
H = -350000 -298*350 = -454300 J = -454.3 kJ
NOTE:
you can't produce more work than heat
then
c.work produced is less than the heat produced, because some of the heat cannot be converted to work
must be true