Question

Casey remembers that molecular motion increases as temperature increases. Identify what effect increased molecular motion.

Answer 1

Answer: Your answer would be D

Explanation: This is because whenever the collision increases the molecular motion increases with it.

Answer 2

D

Molecular motion increases as temperature increases and therefore increasing the molecular motion increases collision frequency.

Explanation:

When a substance is heated, its molecules gain increased kinetic energy even as the substance increases in temperatures. With higher kinetic energy, this means the molecules are moving more rapidly and hence collision between the molecules will be more frequent and of higher energy. It is these high energy collisions that cause the molecules to move further away from each other with increased temperatures (why substances expand).  

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