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+1 vote
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in Physics by (49.4k points)

The coefficient of volume expansion of glycerin is 49 × 10-5K-1. What is the fractional change in its density for a 30°C rise In temperature?

1 Answer

+2 votes
by (53.6k points)
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Best answer

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).

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