IGNOU BPHCT 135 2026 - Calculate vrms for helium atoms at 300K. At what temperature will

Question

Calculate v_rms for helium atoms at 300K. At what temperature will oxygen molecules have the same value of v_rms? Take $m_{He} = 6.67 \times 10^{-27}\text{ kg}$ .

19 Jan 2026

Answer :

Word Count : 261

The root mean square speed (v_{\text{rms}}) of gas molecules is given by the equation: [ v_{\text{rms}} = \sqrt{\frac{3 k_B T}{m}} ] where (k_B) is the Boltzmann constant, (T) is the absolute temperature, and (m) is the mass of a single molecule. For helium, the molar mass (M) is 4 g/mol, so the

_____ _____ _______ _______ ______ __________ ________ __________ ___.
____ ______ _________ ______ ______ __________ ______ ____ _____ _______ ____.
________ ___ _____ _______ ___ ______ _________ _______ _______ ___ __________ ___.
_____ ________ ________ ________ _________ _________.
________ _________ ________ __________ _____ ______.
______ _______ __________ ______ ______ __________ ________ ________ ______ __________ _____ ______.
__________ ________ ___ _____ ____ __________ _____.
_______ ___ ______ ___ _____ _____ _______.
___ _____ ____ ___ _______ _____ ___.
_________ _________ _____ __________ ____ _________ ______.
______ __________ ______ _____ ___ _____ ___ ______ ___ _________ ___ __________.
_____ ___ ______ _____ __________ _________ _________ __________ ________ ______ _________ ________.
_______ ____ _________ ________ ________ _____.
____ ______ _______ ____ _____ _________ ____ _______ ______ _______.
__________ ___ __________ ________ ________ _______.
________ ____ ________ _________ _________ _______ _____ ________ ______ ________ ______ _______.
__________ _____ ____ _______ ___ __________ ___.
______ ________ _______ ___ ______ _______.
___ _________ _______ _______ __________ ____ ________ ________ ___ __________ _________ ________.
________ _______ _________ ___ ___ _____ ______ ________ _____ ______ ___.
________ ___ _________ ___ ______ __________ ___.
_________ ___ _________ ______ __________ _________ _____ _____ ____ ___ ______.
______ _____ ____ __________ _______ _____.
__________ _________ _______ __________ __________ ______.
_________.

IGNOU ACADEMY

Your IGNOU journey, made easier.

Solved Assignments
Study Notes
Guess Papers
Question Papers

Call Us WhatsApp

STUDY • PREPARE • SUCCEED

Skip in 10

IGNOU Solved Assignments Assignments Ignou Projects Project Previous Year Solved Exam Papers Notes Notes Sample Question Papers Sample Question Papers