Question: 1. The entropy change at a high temperature TX where aluminium is oxidized by oxygen is 335 JK-1mol-1. The standard state entropy is -310.25 JK-1mol-1.

1. The entropy change at a high temperature TX where aluminium is oxidized by oxygen is 335 JK-1mol-1. The standard state entropy is -310.25 JK-1mol-1. Calculate TX if Tf = 900K and Hf = 10400 Jmol-1 Al.

Given:

Cp = 105.19 JK 1mol1, CpO2 = 31.6 JK 1mol1, Cp= 27.8 JK 1mol1 and Cp{Al} = 32.5 JK 1mol1 .

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