Chemistry Help?

Question

Calculating ΔGorxn from ΔGof
a. What is the standard free-energy change for the following reactIon at 25 0C?

2C6H6 (l) + 15O2 (g) --> 12CO2 (g) + 6H2O (l)

b. Is this reacIon spontaneous at 25 0C? 

 

Answer 1

Step 1:

(a)

The chemical reaction is .

Standard free energy change :

Standard free energy change in terms of .

,

where is the standard free energy change.

is the free energy change.

n is the number of moles.

Free energy change for CO₂ is .

Free energy change for H₂O is .

Free energy change for C₆H₆ is .

Free energy change for O₂ is .

Step 2:

(b)

For a spontaneous reaction, .

Here .

Hence the reaction is a spontaneous reaction.

Solution:

(a)  .

(b) The reaction is a spontaneous reaction.