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While drawing cooling curve between the ...

While drawing cooling curve between the temperature of hot water and time we should stir the water uniformly, this has been done to ensure that

A

temperature of water in the calorimeter is same at all placed

B

cooling will occur fast to save the time of experiments

C

We can stir water non-uniformly also

D

None of these

Text Solution

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The correct Answer is:
A
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Ice is put into a tumbler containing water at room temperature. To cool water quickly, should the ice be allowed to float naturally in water or be pushed to the bottom of the tumbler with spoon and held there? Justify your answer.

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Knowledge Check

  • A cooling curve is plotted between the temperature of a hot body and time. Which of the following is not true for the cooling curve?

    A
    Cooling is faster from a calorimeter having a larger surface area than a smaller one.
    B
    Cooling is faster from a calorimeter painted black from outside than that from a polished surfaced calorimeter.
    C
    Cooling is faster from a copper calorimeter than from a steel calorimeter.
    D
    The rate of cooling remains same throughout the experiment. Hence the graph is a striagth line

  • While doing an experiment on plotting the temperaure-time graph of hot water as it cools, we can get a good graph:

    A
    only by noting the temperature of hot water every 30 seconds throughout
    B
    only by noting the temperature of hot water every 1 minute throughout
    C
    by noting the temperature of hot water every 1 minute to start with and every 2 minutes later on
    D
    by noting the temperature of hot water every 2 minutes to start with and every 1 minute later on

  • The correct graph between the temperature of a hot body kept in cooler surrounding and time is (Assume newton's law of cooling)

    A
    B
    C
    D

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