Metal oxides displacement reaction

In summary, when a more reactive metal displaces a solid metal oxide, a lot of heat is required for the reaction to occur. However, both the metal and metal oxide can be in solid form for the reaction to take place. Some thermodynamically favorable reactions of this type may not be exothermic, such as the reaction between zirconium and alumina.
  • #1
sgstudent
739
3
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?
 
Chemistry news on Phys.org
  • #2


sgstudent said:
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.
 
  • #3
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.
 

1. What is a metal oxide displacement reaction?

A metal oxide displacement reaction is a type of chemical reaction in which a more reactive metal displaces a less reactive metal from its oxide compound. This results in the formation of a new metal compound and the release of free metal.

2. How do metal oxides displacement reactions occur?

Metal oxides displacement reactions typically occur when a more reactive metal is mixed with a less reactive metal oxide. The more reactive metal will displace the less reactive metal from its oxide compound, resulting in a reaction.

3. What are some examples of metal oxides displacement reactions?

One common example of a metal oxide displacement reaction is the reaction between iron oxide (FeO) and aluminum (Al). When these two substances are mixed, the aluminum will displace the iron from its oxide compound, resulting in the formation of aluminum oxide (Al2O3) and free iron.

4. What factors can affect the rate of a metal oxides displacement reaction?

The rate of a metal oxides displacement reaction can be affected by several factors, such as the reactivity of the metals involved, the concentration of the reactants, and the temperature of the reaction. Higher reactivity, higher concentration, and higher temperature typically result in a faster reaction rate.

5. What are some practical applications of metal oxides displacement reactions?

Metal oxides displacement reactions have many practical applications, such as in the production of metals from their ores, in the manufacturing of alloys, and in the purification of metals. They are also used in various industrial processes, such as in the production of iron and steel.

Similar threads

Replies
9
Views
1K
Replies
2
Views
2K
Replies
1
Views
622
Replies
12
Views
3K
Replies
2
Views
1K
Replies
4
Views
922
Replies
15
Views
2K
Replies
6
Views
4K
Replies
4
Views
1K
Replies
15
Views
3K
Back
Top