1.

Tin 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:ΔfH∘(SnO2(s))=−581.0 kJmol−1,ΔfH∘(CO2(g))=−394.0 kJmol−1S∘(SnO2(s))=56.0JK−1mol−1,S∘(Sn(s))=52.0JK−1mol−1,S∘(C(s))=6.0JK−1mol−1,S∘(CO2(g))=210.0JK−1mol−1Assume that the enthalpies and the entropies are temperature independent.

Answer»

Tin 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:ΔfH(SnO2(s))=581.0 kJmol1,ΔfH(CO2(g))=394.0 kJmol1

S(SnO2(s))=56.0JK1mol1,S(Sn(s))=52.0JK1mol1,S(C(s))=6.0JK1mol1,S(CO2(g))=210.0JK1mol1

Assume that the enthalpies and the entropies are temperature independent.





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