Question

Enthalpy values for the reaction of 2al+Cr2O3

Answer 1

Answer:

The enthalpies (AH) of formation of Al2O3 and Cr2O3 are - 1596 kj and - 1134 kJ respectively. AH for the reaction : 2 Al + Cr2O3 = 2Cr + Al2O3.is : (1) -462 kJ. (2) -1365 kJ.

Explanation:

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Answer 2

Answer:

H2(g)+S(s)+2O2(g)→H2SO4(l) ΔrH=−811kJ/mol. ... ΔrH=−92kJ/mol; from these data, the heat change of reaction at constant volume (in kJ/mol) at 27∘C for the process 2NaCl(s)+H2SO4(l)→Na2SO4(s)+2HCl(g)

Explanation:

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