Problem 11.4. Calculate the root mean square speed of hydrogen molecule at 800K. Heat problem 4. Sindh Textbook Board (stb) problems. Class 12 chapter heat problems sindh textbook board.

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