(2) When making tea, tea molecules will move into the water, which is a diffusion phenomenon. The higher the temperature, the faster the diffusion, so the tea fragrance and brown color can be brewed quickly with boiling water;
(3) White gas will be ejected from the spout, which is formed because the water vapor ejected from the spout becomes small water droplets and liquefies.
So the answer is: (1) evaporation; (2) diffusion; (3) Liquefaction.