A glass bottle of volume 100 cc at 0°C is filled with paraffin at 20°C. If the density of paraffin at 0°C is 0.8 g/cc, γ paraffin = 10 x 10-4 /°C and the coefficient of linearexpansion of glass is 10 x 10-6 /°C, the mass of paraffin is

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78.45 g

78 .48 g

81.6 g

80 g

answer is B.

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Detailed Solution

Mass = (density) (volume) =[0.8(1-10 x 10-4x 20)][100(1+3 x 10 x 10-6 x 20)] = 80[1-0.02 + 0.0012]=78.48 g

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