Is evaporation of gas a chemical or physical change?
Physical change if I am correct.It will be a different form than the original.In your basic science classes you learned that if you for ex. have water as a solid,liquid and gas they are all the same thing because if solid ice=ice melts that means water,that if it is a liquid it is in its original state and that if it is a gas then it evaporates.The change is physical due to the appearance of it and the form it takes just changing.If a chemical reaction were to take place you would feel heat,sparks,etc.Hope this helps.