The speed of sound does not have a specific value but it depends on the medium. Indeed, it represents the velocity of propagation of a sound wave through a medium. Its more general expression, valid for all gases, is:
a = sqrt[ (dp/drho)_s ]
where s indicates an isentropic process.
A more commonly used expression, for the speed of sound, is the one for calorically perfect gases:
a = sqrt( gamma*R*T)
gamma is the ratio of the specific heats
R is the specific gas constant
T is the medium temperature
Hope that answers your question! ?
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