A flask of volume 10^3 cc is completely filled with mercury at 0 ^oC . coefficient of cubical expans

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10-1.Thermometry, Thermal Expansion and Calorimetry

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A flask of volume $10^3 cc$ is completely filled with mercury at $0 ^oC$. The coefficient of cubical expansion of mercury is $180 × 10^{-6} / ^oC$ and that of glass is $40 × 10^{-6}/ ^oC$. If the flask is now placed in boiling water at $100\ ^oC$, ........ $cc$ mercury will overflow

A

$7$

B

$14$

C

$21$

D

$28$

Solution

Increse in volume of flask

$=40 \times 10^{-6} \times 10^{3} \times 10^{2}=4$

Increase in volume of mercury

$=180 \times 10^{-6} \times 10^{3} \times 10^{2}=18$

Volume of mercury overflow

$=18-4=14 c c$

Standard 11

Physics

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