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diketahui:
t1 = 20°C
m1 = 200 g
t2 = 80°C
m2 = 500 g
ditanya:
tc?
jawab:
m2 . (t2 - tc) = m1 . (tc - t1)
500 . (80 - tc) = 200 . (tc - 20)
40.000 - 500tc = 200tc - 4000
40.000 + 4000 = 200tc + 500tc
44.000 = 700tc
tc = 44.000 / 700
tc = 62,9°C
jadi suhu campurannya adalah 62,9°C