Question

Using a thermodynamic table below , determine the bond energy of F2, along with the fraction...

Using a thermodynamic table below , determine the bond energy of F2, along with the fraction of diatomics that have sufficient energy to react at 298K and 500K.

ΔH°f (kJ mol-1)

ΔG°f (kJ mol-1)

m (J mol-1 K-1)

Cp,m (J mol-1 K-1)

Molecular weight

F2(g)

0

0

202.8

31.3

38.00

F(g)

79.4

62.3

158.8

22.7

19.00

Homework Answers

Answer #1

2 F -> F2

at 298 K

K=0.144

at 500 K

K=0.22

data point 1

(0.16, 298 K)

data point 2

(0.22, 500K)
slpoe of line with these data points where y coordinate is ln(K) and x coordinate is 1/T = 236.04

activation energy/R = 236.04

fraction of diatomics that have sufficient energy to react at 298K =

=

=0.45 = action of diatomics that have sufficient energy to react at 298K

at 500 K

=

0.623= action of diatomics that have sufficient energy to react at 500 K

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