According to kinetic theory of gases, at absolute zero temperature [1990]a)water freezesb)liquid helium freezesc)molecular motion stopsd)liquid hydrogen freezesCorrect answer is option 'C'. Can you explain this answer?

Question

Answer

See it is assumption only that at absolute zero temperature i.e 0 K temperature all type of molecular motion stopes since at earth it is impossible to achieve 0 K temp so i said it is mearly a assumption only . Though it is clear that all materials freeze at absolute 0 temperature  so clearly water, liquid helium and liquid Hydrogen they all freezes . BUT ACCORDING TO THEORY OPTION C SEEMS TO BE MORE ACCURATE.

Answer

Option c is write
because the average kinetic energy of a gas molecular is directly proptional to absolute temperature only,this implies that all molecular motion stops if the temperature is reduced to absolute zero..

Answer

Explanation:

Kinetic theory of gases:
The kinetic theory of gases is a model that describes the behavior of gases based on the motion of their particles. According to this theory, gases are composed of small particles (atoms or molecules) that are in constant motion. The motion of these particles is random and continuous.

Absolute zero temperature:
Absolute zero is the lowest temperature that can be theoretically achieved. It is defined as 0 Kelvin or -273.15 degrees Celsius. At this temperature, the particles of a substance have the minimum possible kinetic energy.

Motion of particles at absolute zero temperature:
According to the kinetic theory of gases, the motion of particles is directly related to their temperature. As the temperature decreases, the kinetic energy of the particles also decreases. At absolute zero temperature, the particles have no kinetic energy, and therefore, their motion stops completely.

Options explained:
a) Water freezes: Freezing is the process in which a liquid changes into a solid due to the removal of heat energy. Absolute zero temperature is much lower than the freezing point of water, which is 0 degrees Celsius. Therefore, water does not freeze at absolute zero temperature.

b) Liquid helium freezes: Similar to water, helium also does not freeze at absolute zero temperature. The freezing point of helium is extremely low (-268.93 degrees Celsius), but it is still above absolute zero.

c) Molecular motion stops: This option is correct. According to the kinetic theory of gases, at absolute zero temperature, the particles have no kinetic energy and their motion stops completely. This is true for all gases, including water and helium.

d) Liquid hydrogen freezes: Hydrogen does not freeze at absolute zero temperature. The freezing point of hydrogen is -259.16 degrees Celsius, which is above absolute zero.

Therefore, the correct answer is option 'C' - molecular motion stops. At absolute zero temperature, the particles of a substance have no kinetic energy and their motion stops completely, as described by the kinetic theory of gases.

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