A metal of mass 1.5 kg was heated from 27oC to 47oC in 4 minutes...

WAEC 1992

A metal of mass 1.5 kg was heated from 27^oC to 47^oC in 4 minutes by a boiling ring of 75 W rating. Calculate the specific heat capacity of the metal, (Neglect heat losses to the surrounding)

A. 2.5 X10³J kg^-10C^-1
B. 6.0 X10²J kg^-10C^-1
C. 2.5 x 10²J kg^-10C^-1
D. 1.4 X10²J kg^-10C^-1
E. 1.0 x 10²J kg^-10C^-1

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Correct Answer: Option B

Explanation

I.Vt = mcθ; C =

I.Vt/mθ

75 x 4 x 60/1.5 x 20

= 6.0 X10²J kg^-10C^-1

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A metal of mass 1.5 kg was heated from 27oC to 47oC in 4 minutes...

Correct Answer: Option B

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