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Q (kalor) = 84 KJ ⇒ 84000 Joule
m (massa) = 500 gram ⇒ 0,5 Kg
t1 = 20°C
c (kalor jenis air) = 4.200 J/(Kg.K)
Ditanyakan : .... ?
Penyelesaian :
t = Q / m . kalor jenis
( - ) = 8400 / 0,5 . 4200
( - 20) = 40
= 40 + 20
= 60°C
m = 500 gram = 0,5 kg
T1 = 20'C
c = 4200
Ditanya: T2?
Jawab : Q = m × c × ΔT
84000 = 0,5 × 4200 × ΔT
84000 = 2100 × ΔT
ΔT = 40'C
ΔT = (T2-T1)
40 = T2 - 20
T2 = 40 + 20
T2 = 60'C
Jadi, suhu tersebut akan berubah menjadi 60'C
Mohon maaf kalau salah .