PHYSICS
JAMB 2000 - Question 20
Physics 2000 JAMB Past Questions - Question 20: A metal of mass 0.5 kg is heated to 100°C and then transferred to a well-lagged calorimeter of heat capacity 80 JK¹ containing water of heat capacity 420 JK¹ at 15°C. If the final steady temperature of the mixture is 25°C, find the specific heat capacity of the metal.
A:
B:
C:
D:
Correct Answer
B
Explanation
Let the specific heat cap. of the metal = C
∴ Heat lost by the metal = heat gained by the Calorimeter + Water
∴ 0.5 x C x [100 - 25]
80 x [25 - 15] + 420 [25 - 15]
0.5 x C x 75 = 80 x 10 + 420 x 10
37.5C = 800 + 4200
C = 5000/37.5 = 133.3Jkg-1K-1
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