A 2000W electric heater is used to heat a metal object of mass 5kg initially at 10oC. If a temperature rise of 30oC is obtained after 10min, the heat capacity of the material is
- 6.0 x 104JoC-1
- 4.0 x 104JoC-1
- 1.2 x 104JoC-1
-
8.0 x 103JoC-1
The correct answer is: D
Explanation
mcΞT = Pt β 5 x c x 30 = 2000 x 10 x 60
c = \(\frac{1200000}{150}\)
c = 8000 = 8.0 x \(10^3JΒΊC^{-1}\)