Calculate the velocity of sound in a mixture of oxygen, nitrogen and argon at 0°C when their masses are in the ratio 2 : 7 : 1. The molecular weights of the gases are 32, 28 and 40 respectively. (answ

Question

Calculate the velocity of sound in a mixture of oxygen, nitrogen and argon at 0°C when their masses are in the ratio 2 : 7 : 1. The molecular weights of the gases are 32, 28 and 40 respectively. (answer in m/s ).

TestHub · Accepted Answer

Moles: 32 2 ​ , 28 7 ​ , 40 1 ​ = 0.0625 , 0.25 , 0.025 , total 0.3375. Mean M = 10/0.3375 = 29.63 g/mol. C v ​ / R = 0.3375 0.3125 × 2.5 + 0.025 × 1.5 ​ = 2.426 , so γ = 1.412 . v = γ RT / M ​ = 1.412 × 8.314 × 273/0.02963 ​ = 328.9 m/s. The printed value differs only by rounding.

Physics - Sound Wave Question with Solution | TestHub

Doubts & Discussion