Physics-
General
Easy

Question

Water and turpentine oil (specific heat less than that of water) are both heated to same temperature. Equal amounts of these placed in identical calorimeters are then left in air

  1. Their cooling curves will be identical    
  2. A and B will represent cooling curves of water and oil respectively    
  3. B and A will represent cooling curves of water and oil respectively    
  4. None of the above    

The correct answer is: A and B will represent cooling curves of water and oil respectively


    As we know, Rate of cooling proportional to fraction numerator 1 over denominator text specific end text   text heat end text left parenthesis c right parenthesis end fraction
    c subscript text oil end text end subscript less than c subscript text Water end text end subscript
    Þ left parenthesis text Rate end text   text of end text   text cooling end text right parenthesis subscript text oil end text end subscript greater than left parenthesis text Rate end text   text of end text   text cooling end text right parenthesis subscript text Water end text end subscript

    It is clear that, at a particular time after start cooling, temperature of oil will be less than that of water.
    So graph B represents the cooling curve of oil and A represents the cooling curve of water

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