Home
Class 12
CHEMISTRY
AI is costilier than Fe but AI is sacrif...

AI is costilier than Fe but AI is sacrificed to convert `Fe_(2)O_(3)` into `Fe`. Why this change is possible. Name this process :
`{:(Delta G_(f(Fe_(2)O_(3)))^(@) =-"742.2 kJ/mole"),(Delta G_(f(AI_(2)O_(3)))^(@)=-"1582 kJ/mole"):}`

Text Solution

Verified by Experts

`{:(2AI + Fe_(2)O_(3) rarr 2Fe + AI_(2) O_(3)),(Delta G^(@) = Delta G_(f(AI_(2)O_(3)))^(@) - Delta G_(f(Fe_(2)O_(3)))^(@)),(=- 1582 + 742.2 =- 839.8 =- ve):}`
Hence this reduction of `Fe_(2)O_(3)` by AI is possible. This is called Thermite Welding.
Promotional Banner

Similar Questions

Explore conceptually related problems

EAN of Fe in [Fe(C_(2)O_(4)_(3)]^(3-) is .

An intimate mixture of ferric oxide and aluminium is used as solid fuel in rockets. Calculate the fuel value per cm^(3) of the mixture. Heats of formation and densities are as follows: H_(f(AI_(2)O_(3)))^(Theta)=-399kcal mol^(-1),H_(f(Fe_(2)O_(3)))^(Theta)=-199kcal mol^(-1) Density of Fe_(2)O_(3)=4.0 g cm^(-3) , Density of Al = 2.0 g cm^(-3)

An intimate mixture of ferric oxide and aluminium is used as solid fuel in rockets. Calculate the fuel value per cm^(3) of the mixture. Heats of formation and densities are as follows: H_(f(AI_(2)O_(3)))^(Theta)=-399kcal mol^(-1),H_(f(Fe_(2)O_(3)))^(Theta)=-199kcal mol^(-1) Density of Fe_(2)O_(3)=4.0 g cm^(-3) , Density of Al = 2.0 g cm^(-3)

Determine whether or not is possible for sodium to reduce aluminium oxide to aluminium at 298K . Also, calculate equilibrium constant for this reaction at 298K . Delta_(f)G^(Theta)AI_(2)O_(3)(s) =- 1582 kJ mol^(-1) Delta_(f)G^(Theta)Na_(2)O(s) =- 377.7 kJ mol^(-1)

Name the four man zones of blast furnace in the extraction of Fe from Fe_(2)O_(3) .

What will be the heat of reaction for the following reaction? Will the reaction be exothermic or endothermic? Fe_(2)O_(3(s))+3H_(2(g))rarr 2Fe_((s))+3H_(2)O_((l)) Delta_(f)H^(@)(H_(2)O,l)=-"285.83 kJ mol"^(-1) Delta_(f)H^(@)(Fe_(2)O_(3),s)=-"824.2 kJ mol"^(-1)

W is the mass of iron (in g) which will be converted into Fe_(3)O_(4) by the action of 18 g of steam on it . What is the value of W/7 ? Fe+H_(2)O to Fe_(3)O_(4)+H_(2)

Name the four main zones of blast furnace in the extraction of Fe from Fe_(2)O_(3) .

Generally alkali metals form their oxides by an average increment of 6 kJ mol^(-1) K^(-1) in their entropies. If at 25^(@)C, Delta G_(f)^(@) of Al_(2)O_(3)(s)=-1582 kJ mol^(-1) , Delta H_(f)^(@) of Li_(2)O(s)=1244 kJ and Delta H_(f)^(@) of Na_(2)O(s)=1411 kJ . The aluminium oxide can be reduced to Al metal by

IUPAC name of K_(3)[Fe(C_(2)O_(4))_(3)] is