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m = 50 gr = 0,05 kg
c = 460 J/(kg K)
∆t = 20 - 100 = -80 °C = - 80 K
Q = __?
kalor
Q = m c ∆t
Q = (0,05 kg) (460 J/kg K) (-80 K)
Q = - 1840 J ← jwb
(negatif karena melepas kalor)
Kalor yang dihasilkan (dilepaskan) sebesar 1840 J
catatan
• ∆t dalamskala Celsius sama dengan dalam skala Kelvin.
• BEDAKAN
...C = kapasitas kalor
...c = kalor jenis