This observation can be explained under the following reasons:
High sodium content
Lowered heat temperature
Organic burn
Explanation:
High sodium content from the potato fluid causes the flame to turn yellow, as indicative of the presence of sodium (flame test).
The colour change could also be attributed to the drastic lowering of the burner heat. Finally, pure organics like wood and fats burn red, a would be the case with fluids from the boiled potatoes.
Under the same conditions of temperature and pressure, a liquid differs from a gas because the particles of the liquid a) are in constant straight-line
