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m = 0,5 kg
c = 400J/kg°C
ΔT = 38-28 = 10°C
Ditanya : Q ?
Jawab
Q = m x c x ΔT
Q = 0,5 x 400 x 10
Q = 2000 J
Q = 0,2 kJ (A)
diketahui : Kp = Kq <===> Kq = 4.Kp
Lp = Lq
Ap = Aq
t.A = C
t.B =
ditanya : f.C
=
Kp .(t.A - t.C) = Kq. (t.C - t.B)
Kp .(110 - t.C) = 4 . Kp (t.C - 10)
110 - t.C = 4 .(t.C - 10)
110 - t.C = 4.t.C - 40
- t.C - 4.tC = - 40 - 110
- 5.tC = - 150
tC = - 150 : - 5
tC =