metal oxides displacement reaction


by sgstudent
Tags: displacement, metal, oxides, reaction
sgstudent
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#1
Feb20-12, 06:06 PM
P: 636
When a more reactive metal displaces a solid metal oxide, a lot if heat is required for the reaction to occur. However, both metal and metal oxide can be solid for the reaction to take place right?
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Borek
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Feb21-12, 01:41 AM
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Quote Quote by sgstudent View Post
When a more reactive metal displaces a solid metal oxide, a lot if heat is required for the reaction to occur.
A lot of heat is required for the reaction to start, later on reaction is exothermic.

However, both metal and metal oxide can be solid for the reaction to take place right?
Yes, they start as powdered solids. Go to youtube and search for thermite videos.
uby
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#3
Jun14-12, 03:56 PM
P: 176
Not all thermodynamically favorable reactions of the type (unbalanced) M + NO = N + MO are exothermic. For example, the reaction of zirconium with alumina:
1.5 Zr + Al2O3 = 1.5 ZrO2 + Al
has a standard gibbs free energy change of -17.8 kJ/mol at 1000C, though its standard enthalpy change is +47 kJ/mol.


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