In: Chemistry
Determine the ∆Sº and ∆Gº using Appendix G for the following reaction.
C2H5OH(l) + 3 O2(g) --> 2 CO2(g) + 2 H2O(l)
Report your answer to four sig figs. Omit unit labels. Only add a - number is the sign is negative. Adding a + to a positive answer messes up the grading.
Link to appendix G: https://openstax.org/books/chemistry-atoms-first-2e/pages/g-standard-thermodynamic-properties-for-selected-substances |
H0=
2
H0CO2
+ 2
H0H20(L)
-
H0C2H5OH(L)
-3
H0O2
H0=2*(-393.51)
+2(-285.83) -(-277.6) -3(0)=-1081.08kJ/mol
S0=
2
S0CO2
+ 2
S0H20(L)
-
S0C2H5OH(L)
-3
S0O2
S0=2(213.8)
+2(70) -(160.7) -3(205.2)=-208.7 J K-1
mol-1
G0=
H0-T
S0
If we consider room temperature i.e 298K
G0=-1081080
-298*(-208.7)=-1018.8874kJ /mol