Solid Iron (II) Oxide reacts with Solid elemental iron and oxygen gas to create Iron (III)...

4.5 Ratings (857 Votes)

The calculations are as given below [take delta S and delta H vaues from standard data chart]

delta S* = delta Sproducts - delta Sreactants

Â Â Â Â Â Â Â Â Â Â Â Â Â = 87.40 - 60.75

Â Â Â Â Â Â Â Â Â Â Â Â Â = 26.65 J/mol.K

delta H* = delta Hproducts - delta Hreactants

Â Â Â Â Â Â Â Â Â Â Â Â Â = 87.40 - (60.75 + 27.28 + 205.03)

Â Â Â Â Â Â Â Â Â Â Â Â Â = 87.40 - 293.06

Â Â Â Â Â Â Â Â Â Â Â Â Â = -205.66 kJ/mol = -205660 J/mol

Feed the values into,

lnK = -delta H*/RT + delta S*/R

Â Â Â Â Â = 205660/8.3145 x (25+273) + 26.65/8.3145

Â Â Â Â Â = 83.004 + 3.205

Â Â Â Â Â = 86.209

K = 2.76 x 10^37

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