Physics
Heat
Easy

Question

One kilogram of ice at 0o C is mixed with one kilogram of water at 80oC. The final temperature of the mixture is (Take specific heat of water=4200Jkg-1K-1 , Latent heat of ice=336KJ/kg-1)

  1. 40oC
  2. 60oc
  3. 0oC
  4. 50oC

The correct answer is: 0oC


    theta subscript mix equals fraction numerator m subscript W theta subscript W minus fraction numerator m subscript i L subscript i over denominator c subscript W end fraction over denominator m subscript i plus m subscript W end fraction
because m subscript i equals m subscript w not stretchy rightwards double arrow theta subscript text mix  end text end subscript equals fraction numerator theta subscript W minus L subscript i over c subscript W over denominator 2 end fraction equals fraction numerator 80 plus 0 minus fraction numerator 336 over denominator 4.2 end fraction over denominator 2 end fraction equals 0 to the power of ring operator straight C

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