Q. 2

Consider a mixtur A. with greater average speed

B. with smaller average speed

C. with greater average kinetic energy

D. with smaller average kinetic energy

Answer :

In kinetic theory of ideal gas, the average energy is given by



Where R=gas constant=8.31Jmol-1K-1


T=temperature of gas


M=molar mass of gas


1. From the formula for average speed, it can be seen that .


2. Molar mass of hydrogen molecule is 2 amu and molar mass of oxygen molecule is 16 amu.


3. So, molar mass of oxygen molecule is greater than molar mass of hydrogen molecule.


4. Therefore, average speed of oxygen molecule will be less than average speed of hydrogen molecule.

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