Ammonium Dichromate Volcano Still Images The ammonium dichromate volcano illustrates what happens in a chemical reaction. The orange solid is ammonium dichromate. When a wick soaked in alcohol is placed into the ammonium dichromate and ignited with a match the higher temperature causes the ammonium dichromate to start reacting. The darker material which is forming is evidence of a chemical change. As the reaction proceeds it generates heat and the dark solid material is formed more rapidly. Flames and sparks can be seen shooting upward. The orange solid has been transformed into a dark gray-green solid and the temperature has changed. These observations are characteristic of a chemical reaction: a substance with one set of properties is transformed into one or more new substances with a temperature change. You can get at large JPEG versions of the images by means of the following links. 0 1 2 3 4 5 6 7 8 9 10 11 Back to the topic
The ammonium dichromate volcano illustrates what happens in a chemical reaction. The orange solid is ammonium dichromate. When a wick soaked in alcohol is placed into the ammonium dichromate and ignited with a match the higher temperature causes the ammonium dichromate to start reacting. The darker material which is forming is evidence of a chemical change. As the reaction proceeds it generates heat and the dark solid material is formed more rapidly. Flames and sparks can be seen shooting upward. The orange solid has been transformed into a dark gray-green solid and the temperature has changed. These observations are characteristic of a chemical reaction: a substance with one set of properties is transformed into one or more new substances with a temperature change.
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© 1999 Division of Chemical Education, Inc., American Chemical Society. All rights reserved.
