1.

Take 100ml of water at 90 degrees Celsius and 200ml of water at 60 degrees Celsius and mix the two .what is the temperature of the mixture?a- 70 degrees Celsiusb-7 degrees Celsiusc-80 degrees Celsiusd- 65 degrees Celsius

Answer»

The temperature of the MIXTURE is 70 degrees Celsius.

HEAT gained by one = heat lost by the other    

  • Now, let US consider final temperature to be T.
  • Therefore,

        0.1 x (T-90) x const = 0.2 x (60-T) x const

        T(0.1) - 9 = 12 - 0.2(T)

        (0.3)T = 21

         T = 21/0.3

            = 70



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