Question 39
Quantity of HeatA 50W electric heater is used to heat a metal block of mass 5kg. If in 10 minutes a temperature rise of 12°C is achieved, the specific heat capacity of the metal is
- A.500 J kg−1K−1
- B.130 J kg−1K−1
- C.390 J kg−1K−1
- D.400 J kg−1K−1
Show the answer and explanation
Answer: A (500 J kg−1K−1)
Explanation
Pt = mcΔθ: c = 50 × 600 ÷ (5 × 12) = 500 J kg−1 K−1.