Question

which gas will have the most collisions between its particles, methane at 340K, carbon dioxide at 80 C, argon at 265K or helium at 20 C?

Answer 1

Answer: Option (b) is the correct answer.

Explanation:

As it is known that more is the kinetic energy present between the molecules of a gas, more will be the number of collisions take place.

Also, relation between kinetic energy and temperature is as follows.

                     K.E = $\frac{3}{2}kT$

This means that more is the temperature of gas more will be the kinetic energy present withing its molecules or vice-versa.

As methane is at 340 K.

Carbon dioxide is at 80 $^{o}C$ = (80 +273) K = 353 K

Argon is at 265 K and helium is at 20$^{o}C$ = (20 + 273)K = 293 K

Therefore, temperature of carbon dioxide gas is the maximum.

Thus, we can conclude that the carbon dioxide gas at 80$^{o}C$ will have the most collisions between its particles.

Answer 2

Hey there!:

Option B,CO2 at 353K

*Since most collisions means that highest kinetic energy.

*As we know that kinetic energy of gas molecules is directly proportional to absolute temperature

*More the temperature, More the kinetic energy.

* Hence B  is the correct answer as it has highest temperature.

Hope this helps!