Question

What would be the final temperature of mixture of 50g of water at 20C temperature and 50g of water at 40C temperature?

Answer 1

Let’s say the final temperature of mixture is x and (20
Now Simply Balance the Energy,

Energy Lost by the hot water=Energy Gain by the cold water

mass of hot water*c*(Temp. of hot water-x)=mass of cold water*c*(x-Temp. of cold water)

50*c*(40-x)=75*c*(x-20)

50*(40-x)=75*(x-20)

2*40–2*x=3*x-3*20

5*x=80+60

x=140/5

x=28

so, the final temperature of mixture is 28 degree Celsius

c: Specific Heat capacity of water