Question

Q 22 The speed of sound in hydrogen at STP is v. What is the speed of sound in helium at stp​

Answer 1

Hey dear,

◆ Answer -

v' = v/√2

● Explaination -

Speed of the the sound in any gas is given by -

v = √(3RT/M)

v ∝ 1/√M

Therefore, speed of the sound in H2 & He is related as -

v/v' = √(M'/M)

Thus, speed of sound in helium is -

v' = v × √(M/M')

v' = v × √(1/2)

v' = v/√2

Therefore, speed of sound in helium will be v/√2 .

Thanks for asking..