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What is the heat in joules required to r...

What is the heat in joules required to raise the temperature of 25 grams of `0^@C` to `100^@C`? What is the heat in Calories? (Specific heat of water `=4.18 J//g^@C` )

Text Solution

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Given m=25 g , `DeltaT`=(100-0)=`100^@C`
or in terms of Kelvin (373.15-273.15)=100K, `C=4.18J//g^@C`
Heat energy required , Q=m x C x `DeltaT` =25 x 4.18 x 100 = 10450 J
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Knowledge Check

  • The heat required to raise the temperature of a body by 1 K is called:

    A
    specific heat
    B
    thermal capacity
    C
    water equivalent
    D
    none of these

  • The amount of heat energy required to rise the temperature of 1 gram of water through 1^(@)C is __________.

    A
    One kilo calorie
    B
    One joule
    C
    One kelvin
    D
    One calorie

  • Heat needed to raise the temperature of 1 kg of water from 14.5^(@)C to 15.5^(@) C is ________ .

    A
    4186 J
    B
    103 J
    C
    1 cal
    D
    4180 cal

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