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Q (kalor) = 84 KJ = 84000 Joule
m (massa) = 500 gram = 0,5 Kg
= 20°C
c (kalor jenis air) = 4.200 J/(Kg.K)
Ditanyakan : .... ?
Penyelesaian :
t = Q / m . c
( - ) = 8400 / 0,5 . 4200
( - 20) = 40
= 40 + 20
= 60°C
m = 500 g = 0,5 kg
t₁ = 20°C
= 4.200 J/kg°C
- Ditanya : t₂
- Jawab :
t = Q : m × c
t₂ - t₁ = 84.000 : 0,5 × 4.200
t₂ - 20 = 40
t₂ = 40 + 20
t₂ = 60
Jadi, t₂ adalah 60°C