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The density of water at $20 ° C is 998 kg / m^{3}$ and $40 ° C 992 k g / m^{3}$ . The coefficient of volume expansion of water is

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3×10-4/C ∘

2×10-4/C ∘

6×10-4/C ∘

10-4/C ∘

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detailed solution

Correct option is A

As ρT2=ρT1(1+γΔT)=ρT11+γT2-T1 Here, T1=20°C,T2=40°C ρ20=998 kg/m3,ρ40=992 kg/m3 ∴ 992=9981+γ(40-20) 992=9981+20γ 992(1+20γ)=998 1+20γ=998992 or 20γ=998992-1=6992 γ=6992×120=3×10-4/C ∘

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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.

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c	$γ_{g} > γ_{R}$	r	liquid level remains same
d	$γ_{g} = 0$	s	liquid level first falls and then rises