What term describes the thermal energy of the molecules in a system?

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Multiple Choice

What term describes the thermal energy of the molecules in a system?

Explanation:
Temperature reflects the thermal energy of the molecules in a system because it measures their average kinetic energy. In the kinetic view of matter, molecules are always moving, and as temperature rises, their average speed—and thus their average kinetic energy—increases. So higher temperature means more thermal energy per molecule on average. Volume and density describe how much stuff is present and how tightly it’s packed, not how energetic the molecules are. Simply calling it energy is too broad, since temperature specifically quantifies the part of energy arising from molecular motion.

Temperature reflects the thermal energy of the molecules in a system because it measures their average kinetic energy. In the kinetic view of matter, molecules are always moving, and as temperature rises, their average speed—and thus their average kinetic energy—increases. So higher temperature means more thermal energy per molecule on average. Volume and density describe how much stuff is present and how tightly it’s packed, not how energetic the molecules are. Simply calling it energy is too broad, since temperature specifically quantifies the part of energy arising from molecular motion.

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