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Is making non-instant coffee a physical or chemical change?

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As many have noted here, roasting most definitely chemically changes coffee. Google pyrolysis, Maillard reactions and Strecker degradation for some examples of what happens in the roasting process. read more

The process of roasting coffee beans triggers a chemical change in the beans. Enzymes and proteins may be denatured and destroyed and other reactions might take place that alter the colour (browning as the material oxidises) and taste of the beans. Grinding the beans and then mixing them into hot water is a physical change. read more

I think making coffee is a chemical change because the signs for a chemical change are: there is a gas given off, a colour change,a different smell,heat given out or absorbed and the change cannot be easily reversed. read more

Fireworks going off is an Chemical change Boiling water added to instant coffee is a physical change because the chemical makeup is not changing. A plant making food by photosynthesis is a Chemical change. The key point about physical and chemical changes is. A Chemical change is one that is near impossible to change back. read more

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Describing a Chemical Reaction
Source: msnucleus.org