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Susan Lawson
9 December, 16:28
What are the 4 main signs of a chemical reaction?
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Alfred Lin
9 December, 19:08
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There are actually five:
1. Color change
2. Precipitates (molar chemistry deals with these a lot)
3. Gaseous formation
4. Odor
5. Release or absorption of heat (temperature change) - > this can physically be observed by release of light or heat.
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Tyrone Richard
9 December, 19:24
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Realese of gas
formation of a solid
production of heat and or light
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