Consider the diagram. which postulate of the kinetic-molecular theory best describes the event in the diagram?
a. most of the volume of a gas is empty space.
b. all collisions between particles are perfectly elastic.
c. there is no force of attraction or repulsion between gas particles.
d. the average kinetic energy of particles depends only on temperature.

Answer : Option B) All collisions between particles are perfectly elastic.

Explanation : Gases consits of molecules which are compressible because the gas particles which have a small volume compared to the container.

The collisions are perfectly elastic because when gases are left alone in a container they don't seem to lose energy and do not spontaneously get converted into a liquid, also energy is not lost during collisions.

In the diagram given above one can interpret that the gaseous molecules are in random motion inside the container and when they collide with other molecule of gas they do not lose energy. Therefore, this shows perfectly elastic collisions.

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.