Question

Prove that isothermal elasticity of a gas is equal to itd pressure

Answer 1

Hiii...
For  isothermal  process  
        PV = K  ................(1)        [ T = Constant ]
differentiating  equation  (1)        [ K = nRT = Constant ]
        Pdv + vdp  = 0 
        =>pdv= - v dp
=>p = -vdp/dv
=> p = -B
(B-bulk modulus)
Hence, isothermal elasticity is equal to pressure.
Hope it helps....