The gas particle that travels the slowest : Xe
Kinetic Molecular Theory (KMT) states that a gas consists of molecules that move at a constant and random speed. The collisions between molecules are perfectly elastic so that no energy is wasted.
The molecules move in straight lines until they collide
Energy because this motion is expressed as Kinetic energy (KE) which can be formulated as:
[tex] \displaystyle KE = \dfrac {1} {2} mv ^ 2 [/tex]
The average kinetic energy value is only affected by temperature changes. The higher the temperature, the average kinetic energy of the molecule increases
This molecule is very small when compared to the distance between molecules, so the volume of gas contains mostly empty space
Gas particles move randomly (both speed and direction, as vector)
Average velocities of gases can be expressed as root-mean-square velocity. (V rms)
[tex] \large {\boxed {\bold {v_ {rms} = \sqrt {\frac {3RT} {mm}}}} [/tex]
R = gas constant, 8,314 J / mol K
T = temperature,
Mm = molar mass of the gas particles
From this equation shows that the velocity of the gas is inversely proportional to the molar mass of the gas particles
So that the greater the molar mass of the gas particles, the smaller the speed
(the slowest)
The molar mass of the given gases are:
It can be seen that Xe has the largest molar mass so that it has the lowest particle gas velocity(the slowest)
kinetic molecular theory
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