Differentiate between temperature and heat.

Differentiate between temperature and heat.

• A. Temperature measures average kinetic energy of particles; heat is the total energy transferred due to a temperature difference.
• B. Temperature is the total energy; heat is average energy per molecule.
• C. Temperature is energy stored; heat is energy used to start a phase change.
• D. Temperature and heat are the same concept.

Answer: (A)

Temperature reflects how fast the particles in a substance are moving on average, i.e., the average kinetic energy of those particles. Heat is the energy that moves between objects because there is a temperature difference, flowing from the hotter to the cooler object until temperatures balance. So temperature tells you how hot or cold something is, while heat is the energy in transit caused by that temperature difference. Think of a hot cup of coffee: its high temperature means the particles are, on average, moving quickly. Heat flows from the coffee to the surrounding air until both reach the same temperature. The amount of heat transferred depends on how much material is involved and how easily it stores energy (its specific heat) in addition to the temperature difference. Choice that says temperature is total energy or that heat is average energy per molecule mixes up these ideas, and saying they are the same thing ignores heat as energy moving between objects.

Temperature reflects how fast the particles in a substance are moving on average, i.e., the average kinetic energy of those particles. Heat is the energy that moves between objects because there is a temperature difference, flowing from the hotter to the cooler object until temperatures balance. So temperature tells you how hot or cold something is, while heat is the energy in transit caused by that temperature difference.

Think of a hot cup of coffee: its high temperature means the particles are, on average, moving quickly. Heat flows from the coffee to the surrounding air until both reach the same temperature. The amount of heat transferred depends on how much material is involved and how easily it stores energy (its specific heat) in addition to the temperature difference.

Choice that says temperature is total energy or that heat is average energy per molecule mixes up these ideas, and saying they are the same thing ignores heat as energy moving between objects.