Question

Molecules that have longer arrows are moving faster. Which statement describes what is happening in this system? A) Molecules vibrate more as temperature decreases. B)Temperature is not related to the average kinetic energy of a system. C)Kinetic energy decreases as temperature decreases. D)There is no change in average kinetic energy between these two systems.

Answer 1

Answer: Option (C) is the correct answer.

Explanation:

When particles move from their initial position then the energy held by them is known as kinetic energy.

Kinetic energy of molecules of a substance is directly proportional to temperature.

Mathematically,         K.E = $\frac{3}{2}kT$

where            k = boltzmann constant

                      T = temperature

Therefore, an increase in temperature will increase the kinetic energy of particles.

Therefore, we can conclude that the statement kinetic energy decreases as temperature decreases, correctly describes what is happening in the given system.

Answer 2

The answer would be C) Kinetic energy decreases as temperature decreases, because temperature affects how fast molecules move. If it is hotter, then more kinetic energy, and if it is colder, then there is less kinetic energy.