How much heat is given out when a piece of iron of mass 50g and specific heat capacity 460 Jkg-1k-1 cools from 85oC to 25oC?
-
A.
1.38 x 106 J -
B.
2.53×104J -
C.
7.66×103J -
D.
1.38×103J -
E.
1.27 X103J
Correct Answer: Option D
Explanation
Q = mcΔθ = 0.050 x 460 x (85 – 25) = 1.38×103J