GS5. Which of the following is a greenhouse gas? University Of Sindh mcqs test

Problem 11.4. Calculate the root mean square speed of hydrogen molecule at 800K.

DATA:

T = 800 K

Vrms of H₂ =?

K=1.38 x 10^-23 JK-¹

SOLUTION:

n=m/M

N/NA= m/M

1÷(6.02 x 10^23)=m/2

m = 3.32 x 10^-²4 g.

or

m = 3.32 x 10^-²7 kg

Using Vrms= √(3kT/m)

Vrms:√((3 x 1.38 x 10^-23 x 800)/(3.32 x 10^-²7))

Vrms:3158.5 m/s