The rms speed of the molecules in 1.2 g of hydrogen gas is 1800 m/s.
What is the thermal energy of the gas?
m = Mass of 1 H molecule: 1.67 x 10^-27 kg
N = Total # of molecules = 7.19 x 10^23 molecules
c = rms speed
The equation provided by my tutor was:
E(therm) = N x (1/2)(m)(c)^2
The Attempt at a Solution
Using the formula i was provided with above:
E(therm) = (7.19 x 10^23 molecules)(1/2)(1.67x10^-27 kg)(1800^2 m/s)
Which equates to 1,945 J.
This answer is wrong, and I am also confused because this number seems oddly close to the translational energy (e=1/2mv^2) which equates to 1.9 KJ earlier in the assignment)
Can someone tell me if I way out to left field and provide some hints?