Questions

The coefficient of volume expansion of glycerine is 49 x $10^{- 5} /^{0} C$ . What is the fractional change in its density (approx.) for 30°C rise in temperature?

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1.5 × 10-2

2.5 × 10-2

2.0 × 10-2

2.8 × 10-2

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detailed solution

Correct option is A

Coefficient of volume expansion of glycerine.γ= 49×10-5/ 0CRise in temperature, ∆T = 30°CAs γ = 1∆T(∆VV) ⇒ ∆VV = γ×∆Tor ∆VV = (49×10-5)×30 = 0.0147Since mass remains constant,Fractional change in density = fractional change in volume = 0.0147 = 1.5 x 10-2

Similar Questions

A vessel having coefficient of cubical expansion $γ_{g}$ contains liquid Of coefficient of real expansion r_R up to certain level. When Vessel
Is heated, match column I and column II.

	Column - I		Column - II
a	$γ_{g} < γ_{R}$	p	liquid level rises continuously from beginning
b	$γ_{g} = γ_{R}$	q	liquid level falls continuously from beginning
c	$γ_{g} > γ_{R}$	r	liquid level remains same
d	$γ_{g} = 0$	s	liquid level first falls and then rises