Question

a molecule of sulphur dioxide is 4 times heavier than an atom of oxygen gas.The average kinetic energy of an oxygen molecule at 298K is​

Answer 1

your complete question is -> a molecule of sulphur dioxide is 4 times heavier than an atom of oxygen gas.The average kinetic energy of an oxygen molecule at 298K is

• (a) four times that of a sulphur dioxide molecule.
• (b) same as that of a sulphur dioxide molecule.
• (c) eight times that of a sulphur dioxide molecule.
• (d) half that of a sulphur dioxide molecule.

answer : option (b)

solution : average kinetic energy of an ideal gas molecule is given as , K.E = (3/2)kT , where k is Boltzmann's constant and T is temperature in Kelvin.

here we see, average kinetic energy of gas doesn't depend on molecular weight or atomic weight of gas.

for same temperature, average kinetic energy of all gaseous molecules are same.

so,The average kinetic energy of an oxygen molecule at 298K is same as that of sulphur dioxide.