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Question

A glass flask of volume 200cm3 is just filled with mercury at 20C. The amount of mercury that will overflow when the temperature of the system is raised to 100C is: γglass=1.2×105/C,γmercury=1.8×104/C


A
2.15cm3
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B
2.69cm3
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C
2.52cm3
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D
2.25cm3
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Solution

The correct option is C 2.69cm3
γglass=ΔVV=1.2×105ΔVglass=βglassV0ΔT=(1.2×105)(200)(10020)=0.19cm3ΔVmercury=βmercuryV0ΔT=(1.8×105)(200)(10020)=2.9cm3ΔVmercuryΔVglass=2.90.19=2.7
Hence option (B) is correct.

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