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Q =500 . 0,5 . (0-(-5)) + 500.80 + 500 . 1. (70-0)
Q =1250 + 40000 + 35000= 76250 j = 76,250kj
Q1 = 500 gr . 0,5 kal/gr . 5
Q1 = 1250 kal
Q2 = m . L
Q2 = 500 gr . 80 kal/gr
Q2 = 40000 kal
Q3 = m . c . delta T
Q3 = 500 gr . 1 kal/gr . 70
Q3 = 35000 kal
Qtotal = Q1 + Q2 + Q3
Qtotal = 1250 kal + 40000 kal + 35000 kal = 76250 kal