. The temperature of 600 g of cold water rises by 15o C when 300 g of hot water at 50o C is added to it. What was the initial temperature of the cold wa


The temperature of 600 g of cold water rises by 15C when 300 g of hot water at 50C is added to it. What was the initial temperature of the cold water?

 

Best Answer

Mass of hot water (m1) = 300 g

Temperature (T1) = 500 C

Mass of cold water (m2) = 600 g

Change in temperature of cold water (T – T2) = 150 C

Final temperature = T0 C

The specific heat capacity of water is c

m1c (T1 – T) = m2c (T – T2)

300 (50 – T) = 600 (15)

T = 6000 / 300

T = 200 C

Final temperature = 200 C

Change in temperature = 150 C

Initial temperature of cold water = 200 C – 150 C

= 50 C

 

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