Question

VM<br />Think<br />The molecular weight of oxygen gas (O.) is 32 while that of hydrogen gas (H) is 2<br />Prove that under the same physical conditions, the velocity of sound in hydrogen is four times that in oxygen.<br />​

Answer 1

Speed of sound = √(Gamma)(RT/M)

Gamma is same for both as both are diatomic , R is const. and also temp. is same for both so

Speed is directly proportional to √(1/M) where M is molar mass

Molar mass of H2 = 2

Molar mass of O2 = 32

V(H2)/V(O2) = √(32/2) = 4