A system is said to be in dynamic equilibrium when: A) the sum of the concentrat

Question

A system is said to be in dynamic equilibrium when: A) the sum of the concentrations of the reactants is equal to the sum of the concentrations of the products. B) the forward and reverse reactions come to a halt. C) there is no longer any net change in the concentrations of products or reactants. D) you have let the reaction proceed for approximately 30 minutes and can assume there will be no more changes. E) none of the above For the reaction S_2F_6(g) 2SF_2(g) + F_2(g), the equilibrium concentrations are as follows: [S_2F_6] = 0.000430 M, [SF_2] = 2.08 M, [F_2] = 1.32 M. The equilibrium constant is: A) 8.43 times 10^3 B) 1.19 times 10^-4 C) 1.33 times 10^4 D) 7.53 times 10^-5 E) none of the above

Explanation / Answer

Ans -16)

a system is said to be dynomic equilibrium , when there is no change in the macroscopic property of the system like entropy , internal energy , concentartion etc.

in this case option c is correct

ans --17)

given [F2]=1.32M [SF2]=2.08M , [S2F6]=0.000430M

We can write , k=[F2] [SF2]^2 / [S2F6]

K=1.32(2.08)/0.000430

K=13281.041

K=1.3*10^4

Here option c is correct

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