Given, rglycerin = 49 × 10-5K-1
∆T = 30°C = 30 K
Let the volume be V1 at temperature and V2 at temperature T2 Using V2
= V1(1 + r ∆T), we get
Fractional change in density
= 0.9855 – 1
= – 0.0145
= – 1.5 × 10-2
(The negative sign denotes a decrease in density).