contestada

What is δg for the formation of solid uranium hexafluoride from uranium and fluorine at 25∘c when the partial pressure of f2 is 0.054 atm ? the standard free energy of formation of uf6(s) is -2068 kj/mol?

Respuesta :

The reaction is

[tex]U(s)+3F_{2} (g)-->UF_{6} (s)[/tex]

the Q of reaction will be

[tex]Q = \frac{1}{(pF_{2})^{3}}[/tex]

[tex]Q = \frac{1}{(0.054)^{3}  } = 6350.66[/tex]

Δ[tex]G=[/tex]Δ[tex]G^{0}+RTlnQ[/tex]

Putting values

ΔG = -2068000 + (8.314)(298)lnQ

ΔG = -2068000 + (8.314)(298)ln(6350.66) = -2046305 J /mol = -2046.3 kJ / mol



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