Question

Nitrogen is a vital element for all living systems, but except for a few types of...

Nitrogen is a vital element for all living systems, but except for a few types of bacteria, blue-green algae, and some soil fungi, most organisms cannot utilize N2 from the atmosphere. The formation of "fixed" nitrogen is therefore necessary to sustain life, and the simplest form of fixed nitrogen is ammonia NH3. A possible pathway for ammonia synthesis by a living system is:

12N2(g)+32H2O(l)→NH3(aq)+32O2(g)

where (aq) means the ammonia is dissolved in water.

Substance ΔG∘f
(kJ⋅mol−1)
N2(g) 0
H2O(l) −237.1
NH3(aq) −26.5
O2(g) 0

Calculate ΔG∘f for the biological synthesis of ammonia at 298 K.

Calculate the equilibrium constant for the biological synthesis of ammonia.

Homework Answers

Answer #1

1/2N2(g)+3/2H2O(l)→NH3(aq)+3/2O2(g)

ΔG∘rxn   = ΔG∘f products - ΔG∘f reactants

                 = 3/2*0 -26.5-(1/2*0 + 3/2*-237.1)

                 = -26.5+355.65

                  = 329.15KJ/mole    = 329150J/mole

ΔG∘    = -RTlnK

329150 = -8.314*298*2.303logK

329150     = -5705.84logK

logK          = -329150/5705.84

logK         = -57.68

K            = 10^-57.68    = 2.1*10^-58>>>>>answer

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT