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25 March, 23:29

Determine the relative amounts (in terms of volume fractions) for a 15 wt% sn-85 wt% pb alloy at 100°c. the densities of tin and lead at 100°c are given as follows: Ïsn = 7.29 g/cm3 Ïpb = 11.27 g/cm3

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  1. 25 March, 23:56
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    Volume fraction = volume of the element / volume of the alloy

    Volume = density * mass

    Base: 100 grams of alloy

    mass of tin = 15 grams

    mass of lead = 85 grams

    volume = mass / density

    Volume of tin = 15g / 7.29 g/cm^3 = 2.06 cm^3

    Volume of lead = 85 g / 11.27 g/cm^3 = 7.54 cm^3

    Volume fraction of tin = 2.06 cm^3 / (2.06 cm^3 + 7.54 cm^3) = 0.215

    Volume fraction of lead = 7.54 cm^3 / (2.06 cm^3 + 7.54 cm^3) = 0.785

    As you can verify the sum of the two volume fractions equals 1: 0.215 + 0.785 = 1.000
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