Question

Is water evaporating from a pond a physical or chemical change and why

Answer 1

A change of state is always considered a physical change. 

Going from a liquid to a gas is a change in state, so its physical. 

Answer: Physical change

Answer 2

Evaporation is a physical phenomenon, as with the action of sunlight, the atoms that make up water (H2O) will stick to a greater state of agitation, causing their separation and subsequent evaporation. In more pressure, more energy would be required (heat, sunlight) to cause the separation. There is no change in the properties of the element, and the process is reversible.

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