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It takes 86.9 J of heat to raise the temperature of 8.09 g of tin from...

It takes 86.9 J of heat to raise the temperature of 8.09 g of tin from 3.39oC to 53.0oC. What is the molar heat capacity of tin?

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Answer #1

Given:

Q = 86.9 J

m = 8.09 g

Ti = 3.39 oC

Tf = 53.0 oC

use:

Q = m*C*(Tf-Ti)

86.9 = 8.09*C*(53.0-3.39)

C = 0.2165 J/g.oC

Molar mass of Sn = 118.7 g/mol

use:

molar heat capacity = specific heat capacity * molar mass

molar heat capacity = 0.2165 J/g.oC * 118.7 g/mol

molar heat capacity = 25.7 J/mol.oC

Answer: 25.7 J/mol.oC

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