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The purest form of iron is prepared by oxidising impurities from cast iron in a reverberatory furnace. Which iron ore is used to line the furnace? Explain by giving the reaction.
(N/A) The lining of the reverberatory furnace is done using haematite $(Fe_{2}O_{3})$,which oxidises the impurities present in cast iron.
The reaction involved is:
$Fe_{2}O_{3} + 3C \rightarrow 2Fe + 3CO$
In this process,carbon is oxidised to $CO$. Other impurities like sulphur,silicon,and phosphorus are also oxidised to $SO_{2}$,$SiO_{2}$,and $P_{4}O_{10}$ respectively. $SO_{2}$ escapes as a gas,while $SiO_{2}$ and $P_{4}O_{10}$ are removed as slag by reacting with a flux.
The reaction involved is:
$Fe_{2}O_{3} + 3C \rightarrow 2Fe + 3CO$
In this process,carbon is oxidised to $CO$. Other impurities like sulphur,silicon,and phosphorus are also oxidised to $SO_{2}$,$SiO_{2}$,and $P_{4}O_{10}$ respectively. $SO_{2}$ escapes as a gas,while $SiO_{2}$ and $P_{4}O_{10}$ are removed as slag by reacting with a flux.
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View SolutionTin is obtained from cassiterite by reduction with coke. Use the data given below to determine the minimum temperature (in $K$) at which the reduction of cassiterite by coke would take place.
At $298 \ K$: $\Delta_{f}H^{\circ}(SnO_{2(s)}) = -581.0 \ kJ \ mol^{-1}$,$\Delta_{f}H^{\circ}(CO_{2(g)}) = -394.0 \ kJ \ mol^{-1}$
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Assume that the enthalpies and the entropies are temperature independent.
At $298 \ K$: $\Delta_{f}H^{\circ}(SnO_{2(s)}) = -581.0 \ kJ \ mol^{-1}$,$\Delta_{f}H^{\circ}(CO_{2(g)}) = -394.0 \ kJ \ mol^{-1}$
$S^{\circ}(SnO_{2(s)}) = 56.0 \ J \ K^{-1} \ mol^{-1}$,$S^{\circ}(Sn_{(s)}) = 52.0 \ J \ K^{-1} \ mol^{-1}$
$S^{\circ}(C_{(s)}) = 6.0 \ J \ K^{-1} \ mol^{-1}$,$S^{\circ}(CO_{2(g)}) = 210.0 \ J \ K^{-1} \ mol^{-1}$
Assume that the enthalpies and the entropies are temperature independent.
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