You have m kgs of a certain liquid in a vessel, which is heated till there is a temperature change of ΔT. If the coefficient of volume expansion is γ, what is the density of the liquid after heating, if the initial density was ρ?
ρ′ = ρ (1 − γΔT)
We know that
m=ρV=Constant⇒ρ1V2=ρ2V2⇒ρV=ρ1{V(1+γ×ΔT)}ρ1=ρ1+γΔTρ1=ρ(1−γΔT)