WAEC - Physics (1992 - No. 20)

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)

2.5 X10³J kg^-10C^-1

6.0 X10²J kg^-10C^-1

2.5 x 10²J kg^-10C^-1

1.4 X10²J kg^-10C^-1

1.0 x 10²J kg^-10C^-1

Explanation

I.Vt = mcθ; C =

I.Vt/mθ

75 x 4 x 60/1.5 x 20

= 6.0 X10²J kg^-10C^-1

WAEC - Physics (1992 - No. 20)

Explanation

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