Question

What is thermal energy? the average overall volume of a system the total number of molecules in a system the kinetic energy of particles in a system the measure of temperature in a system

Answer 1

Thermal energy is the kinetic energy resulting from the random motion of atoms and molecules in a system, contributing to the system's overall temperature. Temperature measures this thermal energy per particle, indicating how 'hot' or 'cold' a system is. Heat is the transfer of thermal energy between systems of different temperatures.

Step-by-step explanation:

Thermal energy is the kinetic energy associated with the random motion of atoms and molecules in a system. It is an intensive property that reflects the average kinetic energy of the system's constituent particles. When particles move or vibrate more quickly, they carry higher thermal energy, which usually corresponds to a higher temperature. However, it is essential to distinguish thermal energy from temperature itself. Temperature is a measure of the thermal energy per particle in a system and is an indication of how 'hot' or 'cold' a system is, while thermal energy is a total amount of kinetic energy due to particle motion.

When a substance absorbs thermal energy, this typically results in an increase in temperature, assuming no phase change occurs. Conversely, releasing thermal energy from a substance typically results in a decrease in temperature. In the context of thermal systems, heat is the transfer of thermal energy from one body or system to another with a different temperature. The SI unit for measuring energy, heat, and work is the joule (J).

Answer 2

Answer: Option (c) is the correct answer.

Step-by-step explanation:

The internal energy of a substance that occurs due to the kinetic energy of molecules or atoms inside the substance.

Therefore, we can conclude that thermal energy is the kinetic energy of particles in a system.

As it is known that energy can neither be created nor it can be destroyed. It only transforms from one form to another.

When the molecules or atoms strike at the walls of the system then the energy of molecules or atoms get transferred to the walls of the system. As a result, the system will become hotter.

Therefore, more is the kinetic energy of the molecules or atoms, more hotter will be the system.