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
E
1.0 x 102J kg-10C-1
Verified Correct Answer: B.
Physical Principles & Numerical Solution
I.Vt = mcθ; C = I.Vt/mθ = 75 x 4 x 60/1.5 x 20
= 6.0 X102J kg-10C-1
Source: Myschool Past Questions Archive (Record #24262)