Which of the following is an indicator that a chemical reaction occurred? A precipitate is formed
The state of matter changed
It was melted
The identity of the substance did not change​

answer: the rate of diffusion increases with increase in temperature.

increase in temperature, increases the molecular/particles speed (kinetic energy. diffusion means movement of particles through the material.

generally, the heavier the particle the more it interacts with the environment and more the temperature matters. so higher temperature results in higher diffusion.

if you're asking what comes out, it's steam.