# Thermodynamics- rms translational kinetic energy

## Homework Statement

A container having a volume of 1m^3 holds 5 moles of helium gas at 50C. If the helium behaves like an ideal gas, the rms translational kinetic energy is?

Total E= 3/2 nRT

## The Attempt at a Solution

I tried solving this question using this equation, but I did not get the right answer.
The correct answer is 6.7 x 10^-21 J

ehild
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ehild

Total Ek= 3/2 nRT
= 3/2 x 5 x 8.314 x 323
= 20140.7J, but this answer is wrong

vela
Staff Emeritus