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Stereoisomerism

70. The stand...

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70. The standard enthalpy of formation of FeO and Fe2O3 is-65 kcal mol^{-1} and一197 kcal mol^{-1} respectively. A mixture of two oxides contains FeO and Fe2O3 in the mole ratio 2 1. If by oxidation, it is changed into a1: 2 mole ratio mixture, how much of thermal energywill be released per mole of the initial mixture?

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Q. The standard enthalpy of formation of

F e O

F e_{2} O_{3}

- 65 k c a l m o l^{- 1}

- 197 k c a l m o l^{- 1}

respectively. If a mixture containing

F e O

F e O_{3}

2 : 1

mole ratio on oxidation is changed into

1 : 2

mole ratio, thermal energy in kcal released per mole of mixture will be :

Q. The standard enthalpy of formation of

F e O

F E_{2} O_{3}

- 65 k c a l m o l^{- 1}

- 197 k c a l m o l^{- 1}

respectively mixture of two oxides contains

F e O

F e_{2} O_{3}

in the mole ratio

2 : 1

. If by oxidation, it is changed into a

1 : 2

mole ratio mixture, how much of thermal energy will be released per mole of the initial mixture?

Q. The standard enthalpy of formation of

F e O

F e_{2} O_{3}

- 65 k c a l m o l^{- 1}

- 197 k c a l m o l^{- 1}

respectively. If a mixture containing

F e O

F e O_{3}

2 : 1

mole ratio on oxidation is changed into

1 : 2

mole ratio, thermal energy in kcal released per

6

mole of mixture will be (nearest integer)____________.

3 : 2

molar ratio mixture of

F e O

F e_{2} O_{3}

react with oxygen to produce a

2 : 3

molar ratio mixture of

F e O

F e_{2} O_{3}

. Find the mass (in g) of

O_{2}

gas required per mole of the initial mixture.

1.0

mol of Fe reacts completely with

0.65

O_{2}

to give a mixture of only

F e O

F e_{2} O_{3} .

The mole ratio of ferrous oxide to ferric oxide is:

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