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Question

The density of a liquid at 1000C is 8.0 gm/cm3 and at 00C is 8.4 gm/cm3, the coefficient of cubical expansion of the liquid is?

A
104/0C
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B
5×104/0C
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C
8×104/0C
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D
4×104/0C
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Solution

The correct option is A 104/0C
Use the formula of volumetric thermal expansion,V=V(1+3α×ΔT)

we know,density=massVolume

because mass can't be change if temperature change.so,formula of thermal expansion for density,

d=d(1+3α×ΔT)

9.7=10[1+3α×(1000)]

9.7=10[1+300α]

9.7+2910α=10

2910α=0.3

α=0.00010309

α=1.0309×104

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