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Diketahui:
m = 10 kg
c air = 4200 J/kg°C
Δt = 30°C - 10°C = 20°C
Ditanya : Q = ...?
Jawab :
Q = mcΔt
= 10 × 4200 × 20
= 840.000 J
2)
Diketahui :
m = 2 kg
Δt = 100°C - 20°C = 80°C
c = 450 J/Kg°C
Ditanya :
a). Q = ...?
b). h = ...?
c). Q = ...? ( Jika m = 4m)
Jawab:
a).
Q = m·c·Δt
= 2 kg × 450 J/kg°C ×80°C
= 72.000 J
b).
h = m . c
= 2 kg · 450 J/kg°C
= 900 J/°C
c).
Jika m = 4m
h = m . c
= (2 x 4) x 450
= 8 x 450
= 3.600 J/°C