A metal of mass 1 5 kg was heated from 27oC to ... - WAEC Physics 1992 Question
A metal of mass 1.5 kg was heated from 27oC to 47oC 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
correct option: b
I.Vt = mcθ; C =
I.Vt/mθ =
75 x 4 x 60/1.5 x 20
= 6.0 X102J kg-10C-1
= 6.0 X102J kg-10C-1
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