A substance that influences the reaction but does not participate in the reaction is called a catalyst. In other words, it <span>increases the rate of a chemical reaction without itself undergoing any permanent chemical change.
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Answer:
Phase changes typically occur when the temperature or pressure of a system is altered. When temperature or pressure increases, molecules interact more with each other. When pressure increases or temperature decreases, it's easier for atoms and molecules to settle into a more rigid structure.
Explanation:
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SUBLIMATION
is the phase change in which a substance changes from a solid to a gas or vapor without changing to a liquid first. When a gas or vapor changes directly into a solid without first changing to a liquid, the phase change is called deposition.
