Why is the sound of escaping gas heard first , but smell of the gas comeslater when we open a gas tap ?

Question

why is the sound of escaping gas heard first

Answer 1

Sounds travels faster than the dispersion of molecules that carry the odor.

Answer 2

sound is faster than dispersion. Also the water molecule in the gas tank is also preventing a huge amount of gas smell to escape.

Answer 3

from a vessel the gas escapes at high velocity as their Crms value is high and their kinetic energy is also high but air particles dont travel fast to our nose but sound can travel in form of wave and smell must be carried by air molecules but sound can travel by striking of particles which is much faster  

Answer 4

Sound travels way faster than dispersion of gas molecules. Thats why gas is heard first and then smelt.    

Answer 5

Farts are usually heard before the smell............ unless it's silent but deadly.