Question

Diket 1 kg air bersuhu 20 derajat celcius, dicampur dengan 1 kg air bersuhu 50 derajat celcius, maka suhu akhir campuran adalah...

Answer 1

m1 =  massa 1 = 1 kg
m2 =  massa 2 = 1 kg
t1 =  suhu 1 = 20°C
t2 =  suhu 2 = 50°C
t = suhu campuran  

m1 (t - t1) = m2 (t2 - t)
1 (t - 20) = 1 (50 - t)
 t - 20 = 50 - t
2t = 50 + 20
t = 70/2
t = 35°C

Answer 2

Karena kalor jenis sama, maka pakai cara cepat saja
Qserap = Qlepas
Tc = (m1.T1 +m2.T2)/(m1+m2)
Tc =( 1. 20 + 1. 50 ) / (1+1)
Tc = 70/2
Tc = 35 derjat
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