Comparing Kinetic Energy of N2 and CO2 Molecules at Ambient Conditions

[chemistry1]

Two identical bottles contain the same number of molecules at ambiant conditions of temperature and pression.The first contains N2, and the second CO2.Tell if the it's true/false and explain why

The molecules of CO2 have more kinetic energy than the molecules of N2.

My answer : False because if we consider the mass of each sort of molecules, we see clearly that a molecule of N2 is 28,02 of mass unit while CO2 is 44,01 mass unit. The latter having a bigger mass, it clearly goes at a lower speed, which results in having less kinetic energy.

Would this justification be any good ?

Thank you!

 

[Borek]

How is the energy of the molecule related to the temperature?

 

[chemistry1]

Well, if the temparture gets higher the molecules tend to move faster and produces more kinetic energy.Atleast, that's what I understood from reading my things...

 

[Borek]

Correct - but there is a simple relationship between temperature and kinetic energy. It is derived here:

http://hyperphysics.phy-astr.gsu.edu/hbase/kinetic/molke.html

 

[chemistry1]

I don't know any calculus :/ But is my interpretation any good??