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m = 500 gr = 0,5 kg
Kalor jenis es = 2100 J/kg °C
Kalor jenis air = 4200 J/kg °C
Kalor lebur es = 340.000 J/kg °C
*Q1 = m x c.es x (t2-t1)
= 0,5 kg x 2100 x 5
= 5250 Joule
*Q2 = m x L
= 0,5 x 340.000
= 170.000 Joule
*Q3 = m x c.air x (t2 - t1)
= 0,5 x 4200 x 20
= 42.000 Joule
Jadi Q total = Q1 + Q2 + Q3
= 5250 + 170.000 + 42.000
= 217.250 Joule