Question

2. what do we call the change when a solid changes directly into a gas? Ans: 3. explain what happens when a substance melts, using the particle theory. ( please answer as soon as possible)

Answer 1

Answer:

Key Points. Sublimation is an endothermic phase transition in which a solid evaporates to a gas. Solids that sublimate have such high vapor pressures that heating leads to a substantial vaporization even before the melting point is reached.