Zmieszano 35 kg wody o temperaturze 10C z 15 kg wody o temperaturze 5C. Oblicz temperaturę otrzymanej mieszanki.
dane:
m1 = 15 kg
t1 = 5 oC
m2 = 35 kg
t2 = 10 oC
szukane:
tk = ?
m1C(tk-t1) = m2C(t2-tk) /:c
m1(tk-t1) = m2(t2-tk)
m1tk -m1t1 = m2t2-m2tk
m1tk+m2tk = m1t1+m2t2
tk(m1+m2) = m1t1+m2t2 /:(m1+m2)
tk = (m1t1+m2t2)/(m1+m2)
tk = (15kg*5C +35kg*10C)/(15kg+35kg)
kk = 8,5 oC
==========
Odp.Szukana temperatura mieszanki wynosi 8,5 oC.
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dane:
m1 = 15 kg
t1 = 5 oC
m2 = 35 kg
t2 = 10 oC
szukane:
tk = ?
m1C(tk-t1) = m2C(t2-tk) /:c
m1(tk-t1) = m2(t2-tk)
m1tk -m1t1 = m2t2-m2tk
m1tk+m2tk = m1t1+m2t2
tk(m1+m2) = m1t1+m2t2 /:(m1+m2)
tk = (m1t1+m2t2)/(m1+m2)
tk = (15kg*5C +35kg*10C)/(15kg+35kg)
kk = 8,5 oC
==========
Odp.Szukana temperatura mieszanki wynosi 8,5 oC.