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1275 kJ = m.4190 J/kg° C . (100-25)
1275 kJ = m.4190 J/kg° C . 75 ° C
1275 kJ = m.314250 J/kg
1275000 J/314250 J/kg = m
4, 05 kg = m
Q = 1275 kJ
c = 4.190 J/kgºC
delta t = 100ºC - 25ºC = 75ºC
m = ?
jawab :
Q = m.c.delta t
1275.000 = m × 4.190 × 75
m = 1275.000/(4.190 × 75)
m = 4,057 kg