Why NaNO3 has a higher thermal stability than NaNO2

High thermal stability" is equivalent to "low enthalpy of formation in standard" nano3 has high thermal stability. Because the number of chemical bonds of nitrate is more than that of nitrite (one more NO) when the amount of substance is the same, the thermal stability of sodium nitrate is high.

And because sodium nitrate, sodium nitrite, and oxygen are endothermic reactions, indicating that sodium nitrate is more stable.

I don't know if my little sister is a high school student, but if it is, it may be a little incomprehensible, so let's talk about it roughly.

In terms of the reason, the greater the bond energy of the chemical bond, the stronger the chemical bond, and the less likely the compound is to decompose. The thermal decomposition of sodium nitrate and sodium nitrite is related to the bond energy of the nitrogen-oxygen bond, because the actual decomposition is the nitrogen-oxygen bond, the three nitrogen oxidation bonds in the nitrate are between the single and double bonds, and the nine electrons are free between the four atoms, and nitrite is a nitrogen oxidation chemical bond between two single and double bonds, and the bond energy is smaller and easier to break.

In short, this explanation is also very probable.

Appendix Thermal stability law of oxylates:.

1 The acid is unstable, and its corresponding salt is also unstable; The acid is more stable, and its corresponding salt is also more stable.

2 Salts of the same acid, thermally stable normal hydrochloric acidic hydrochloric acid.

3 The order of thermal stability of salts of the same acid group is alkali metal salts, transition metal salts, and ammonium salts.

4 For the same acid-forming element, its ** oxygenated acid is more stable than low-valent oxygenated acid, and the same is true of the stability order of its corresponding oxygenate.

The valency of nitrate in nitrate ions has reached its highest valence +5, which is relatively stable;

The valency of nitrate in nitrite ions is +3 valence, the chemical properties are relatively unstable, and it is easy to lose 2 electrons to reach a stable state of +5 valence, so nitrite ions are more unstable than nitrate ions.

High thermal stability" is equivalent to "low enthalpy of formation in standard" nano3 has high thermal stability.

Because the spring bridge is the amount of matter.

At the same time, the number of chemical bonds of nitrate is more than that of nitrite (one more N O), so the thermal stability of sodium nitrate is high.

Sodium nitrate Sodium nitrite.

Oxygen. This is a suction-to-sucking and hot reaction, indicating that sodium nitrate is more stable.

The valency of nitrate in nitrate ions has reached its highest valence +5, which is relatively stable. Disguise.

The valency of nitrate in nitrite ions is +3 valence, and the chemical properties are relatively unstable, and it is easy to lose 2 electrons to reach the stable state of +5 valence in the state of Tingyuanzhou, so it is said that nitrite ions are more unstable than nitrate ions.