HD Chemistry- The Ammonium Dichromate Volcano

Ammonium Dichromate is a somewhat compact orange solid that when heated decomposes into a green solid Chromium(III)Oxide( that appears to grow in size) along with nitrogen and stream. You can see why this reaction is called a volcano reaction.

The reaction
(NH4)2Cr2O7 (s) → Cr2O3 (s) + N2 (g) + 4 H2O (g) (ΔH=−429.1 ± 3 kcal/mol)

Category:

Science & Technology

Tags:

• chemistry
• demonstration
• science
• decomposition
• redox
• fair
• reaction
• exothermic
• volcano

[Ipodtouchfreak550]

is that a physical or chemical change and why?

[TheZofia25]

use soda with mentos and see what happens

[TheZofia25]

dweeb

[mattlycra]

@dawn871213 Sure, if you have a fume hood and the capability to handle it safely. The Ammonium Dichromate is carcinogenic. None of the by-products of decomposition are particularly harmful, though (Nitrogen, water, and Chromium(III) oxide).

[2andahalfmenfreak]

uhh, enjoy cancer ;)

[dawn871213]

Is just fire and ammonium dichromate is enough? Wow I can teach my students with the volcano simulation XD.