A metal of mass 1 kg at constant atmospheric pressure and at initial temperature 20∘C is given a heat of 20000 J. Find the following (JEE 2005)
(Given, specific heat = 400 J/kg⋅∘C , coefficient of cubical expansion, γ=9×10−5/∘C , density ρ=9000 kg/m3 , atmospheric pressure = 105 N/m2 )
(a) change in temperature,
(b) work done and
(c) change in internal energy.