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Which of the following is true regarding the kinetic theory of matter?
Particles of matter are stationary at absolute zero
Particles of matter possess kinetic energy
The space between particles is zero in gases
Intermolecular forces are strongest in gases
Particles of matter possess kinetic energy
The kinetic theory of matter postulates that all matter consists of tiny particles that are in constant motion. Because these particles possess motion, they inherently possess kinetic energy, which increases with temperature.
The kinetic theory of matter postulates that all matter consists of tiny particles that are in constant motion. Because these particles possess motion, they inherently possess kinetic energy, which increases with temperature.
Think of a crowd in a concert; even if they are packed tightly in one spot (solid), they are still shifting or tapping their feet (vibrating), possessing energy.
EkтАЛ=23тАЛkBтАЛT тАФ Average kinetic energy of a gas particle, where kBтАЛ is the Boltzmann constant and T is absolute temperature.
According to the kinetic molecular theory, the particles of matter are in a state of continuous random motion (Brownian motion). The average kinetic energy of these particles is directly proportional to the absolute temperature (T) of the substance. Even in solids, particles vibrate about fixed positions, meaning they possess vibrational kinetic energy.
Matter is composed of particles that are always moving.
Temperature is a measure of the average kinetic energy of particles.
Intermolecular forces decrease as distance between particles increases.
Absolute zero is the theoretical temperature where motion would stop, but it is physically unreachable.
Diffusion of gases and liquids
Thermal expansion of materials
Absolute zero corresponds to 0┬аK or тИТ273.15┬░C.
Option A is incorrect because absolute zero is a theoretical limit; zero-point energy prevents complete stillness. Option C is incorrect as gases have the largest intermolecular spaces. Option D is incorrect because gases have negligible intermolecular forces compared to solids.
B is correct тАФ Particles of matter are in constant random motion, and therefore possess kinetic energy.
Always remember that temperature is a macroscopic measurement of the microscopic kinetic energy of particles.