Question

Use the data from this table of thermodynamic properties to
calculate the values of Δ𝑆 rxnΔSrxn∘ for each of the
reactions at 25 °C.

25 °C.

4NH3(g)+7O2(g)⟶4NO2(g)+6H2O(g)

Accepted Answer

∆Srxn=∆Sproducts-∆Sreactants

∆Srxn=(∆S(NO2))4+(∆S(H2O))6-(∆S(NH3))4-(∆S(O2))7

From the tables data in the internet:

∆Srxn=(240.06)4+(188.83)6-(192.5)4-(205.14)7=3.32•109+6.73•106-1.37•109-1.53•1016~(-1.53•1016)
(J/mol•K)

Question #167738

Expert's answer