A block of aluminum is heated electrically by a 30 w heater if the temperature rises by 10°c in 5 minutes, the heat capacity of the aluminum is
-
A.
900 JK-1 -
B.
90 JK-1 -
C.
100 JK-1 -
D.
200 JK-1
Correct Answer: Option A
Explanation
Heat supplied = Heat gained Pt = MCDθ
30 x 5 x 60 = c x 10
where c = mc which is the heat capacity
c = (30 x 5 x60)/10 = 900 JKg-1