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(a)Calculate the energy needed to raise ...

(a)Calculate the energy needed to raise the temperature of 10.0 g of iron from `25^(@)`C to `250^(@)C` if specific heat capacity of iron is 0.45J `.^(@)C^(-1)g^(-1)`.
(b) What mass of copper (specific heat capacity = 0.385 J `.^(@)C^(-1)g^(-1)`) can be heated through the same temperature difference when supplied with the same amount of energy as above.

Text Solution

Verified by Experts

(a) Energy needed `(q) = m xx c xx Delta T = 10.0 xx 0.45 xx ( 500 -25) J = 2137.5 J`
(b) `q= m xx c xx Delta T`
`2137.5 = m xx 0.13 xx ( 500 - 25) ` or ` m = 34.6 g`
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