2000gram air bersuhu 80 derajat cecius dicampur dengan 3000 gram air bersuhu 20 derajat celcius, tentukan suhu campurannya

m1 = 2000 gr = 2 kg
T1 = 80°C
m2 = 3000 kg = 3 kg
T2 = 20°C

Q1 = Q2
m1c(T1-T) = m2c(T-T1)
2(80-T) = 3(T-20)
160 - 2T = 3T - 60
5T = 100
T = 20°C