Temperature measures what?

Temperature measures what?

• A. The average kinetic energy of the atoms of a substance.
• B. The total energy of a system.
• C. The rate of chemical reactions.
• D. The volume of a substance.

Answer: (A)

Temperature measures the average kinetic energy of the atoms or molecules in a substance. When temperature rises, the particles move faster on average, so their kinetic energy increases. The total energy of a system includes other forms of energy (like potential energy from bonds and interactions), so temperature isn’t a measure of total energy. Temperature can influence reaction rates, but it isn’t the rate itself. It also isn’t a direct measure of volume, since volume depends on material properties and pressure as well as temperature.

Temperature measures the average kinetic energy of the atoms or molecules in a substance. When temperature rises, the particles move faster on average, so their kinetic energy increases. The total energy of a system includes other forms of energy (like potential energy from bonds and interactions), so temperature isn’t a measure of total energy. Temperature can influence reaction rates, but it isn’t the rate itself. It also isn’t a direct measure of volume, since volume depends on material properties and pressure as well as temperature.