Question

And 5 atm, which types of particles would have the narrowest distribution of speeds?

a) CO₂
b) O₂
с) N₂
d) All types of particles would have the same distribution of speeds
e) H₂O
f) Ar
g) CCIF

Answer 1

Gases consisting of heavier molecules would have the narrowest distribution of speeds at 5 atm due to their lower root mean square velocity (Urms) and speed distribution that peaks at relatively lower speeds.

Step-by-step explanation:

The type of particle that would have the narrowest distribution of speeds at 5 atm would be gases consisting of heavier molecules. At a given temperature, all gases have the same average kinetic energy (KEavg) for their molecules. Gases composed of lighter molecules have more high-speed particles and a higher root mean square velocity (Urms), with a speed distribution that peaks at relatively higher speeds.

On the other hand, gases consisting of heavier molecules have more low-speed particles, a lower Urms, and a speed distribution that peaks at relatively lower speeds.

In a zeroth-order reaction, the rate of the reaction is independent of the concentration of the reactants. This means that even if the concentration of A or B changes, the rate of the reaction remains constant. This is because the exponent of the reactant in the rate law is 0. Therefore, regardless of the concentrations of A and B, the reaction rate will remain the same -- it is only determined by the rate constant k.