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Which process does not involve a chemical change? 1. cleaning the shower with lime away 2. burning charcoal on the grill 3. boiling water 4. digesting food?

User Tjwallace
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3. Boiling water is just a physical change because the only change is in the state of matter and not in the chemical structure of the water.

H2O(l)-->H2O(g)
User Martin Hauner
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