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NTA Abhyas 2020

Exam: NTA Abhyas
Year: 2020
Subject: Chemistry
Chapter: States of Matter

NTA Abhyas 2020 · Chemistry · States of Matter

At what temperature would N _ 2 molecules have same average speed...

At what temperature would

{N}_{2}

molecules have same average speed as

CO

molecules at

200K

.

Options

A $- 7{3}^{o}C$
B $20{0}^{o}C$
C $70{0}^{o}C$
Dnone

Correct answer

A. $- 7{3}^{o}C$

Step-by-step solution

\text{Average}\text{speed}\text{=}\sqrt{\dfrac{\text{8RT}}{\pi\text{M}}}

Both

{N}_{2}

and

CO

have same molecular mass, So, for same average speed, temperature should be same

∴ \text{T}\text{=}\text{200}\text{K=} - {\text{73}^{o} \text{C}

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