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How much heat energy will be given off i...

How much heat energy will be given off in cooling water of 2.5 kg from`85^(@)C" to "35^(@)C`?

Text Solution

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125 kcal
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What is the value of specific heat capacity of water ? How much heat energy is required to increase the temperature of 5 grams of water to 1^(@)C ?

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Knowledge Check

  • The room temperature is 20''C. Water in a container cools from 55^(@)C to 45^(@)C in 8 minutes. How much time will it take in cooling from 45^(@)C to 35^(@)c ?

    A
    4 minutes
    B
    12minutes
    C
    16minutes
    D
    24 minutes

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    How much heat energy is necessary to raise the temperature of 5 kg of water from 20^@C to 100^@C .

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    In a laboratory experiment to measure the specific heat capacity of copper, 0.02 kg of water at 70^(@)C was poured into a copper calorimeter with a stirrer of mass 0.16 kg initially at 15^(@)C . After stirring the final temperature reached to 45^(@)C . Calculate the heat energy released by water in the experiment in cooling from 70^(@)C to 45^(@)C . (Specific heat capacity of water = 4200 J kg^(-1)""^(@)C^(-1) .

    A swimming pool contains 1 xx 10^(5) L of water.How much energy in joules is required to raise the temperature of water from 20^(@)C to 25^(@)C ? The specific heat capacity of water is (4.184 J)/(.^(@)C) g.

    If 1050 kJ of heat is required to rise the temperature of 18 kg of substance from 25^(@)C" to "35^(@)C , find the thermal capacity and water equivalent of the substance.

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