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Q.

The specific heat capacities of three metals are given below 

 Metal  Specific heat J·g-1·C  -1Fe0.470Pb0.130Zn0.388

If 1.00 g of each metal is heated to 100° C and added to 10.0 g ofH2O at 25.0° C, what is the order of the temperatures of the final mixtures from the lowest to the highest?

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a

Zn<Fe<Pb

b

Pb<Zn<Fe

c

Zn<Pb<Fe

d

Fe<Zn<Pb

answer is B.

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Detailed Solution

specific heat: Pb<Zn<0.470
It is the heat required to raise the temp. of one unit mass of substance by 10C
More the specific heat, more amount of heat required to raise the temp.

order of temp of final mixture

pb<Zn<Fe

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