Home
Class 11
PHYSICS
A calorimeter of water equivalent 10xx10...

A calorimeter of water equivalent `10xx10^(-3)kg` is filled with `70xx10^(-3)kg` of a substance at its melting point. The substance is found to solidify completely in 21 minutes. A similar calorimeter containing `80xx10^(-3)kg` of water at the same temperature cools at the rate of `1.5^(@)C` per minute, the room temperature being the same in both cases. What is the latent heat of fusioin of the substance? (Specific heat capacity of water `=4200 Jkg^(-1) K^(-1)`)

Text Solution

Verified by Experts

The correct Answer is:
`170xx10^(3)Jkg^(-1)`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • CENTRIPITAL AND CENTRIFUGAL FORCES

    NN GHOSH|Exercise Exercises (B)|36 Videos

Similar Questions

Explore conceptually related problems

A calorimeter whose water equivalent is 5xx10^(-3) kg is filled with 50xx10^(-3) kg of water at 80^(@)C . The temperature falls to 75^(@)C in 4 minutes. When it is filled with 40xx10^(-3)kg of another liquid, the time to fall through same range of temperature (from 80^(@)C to 75^(@)C ) is 130 seconds. Find the specific heat capacity of the liquid.

The amount of heat required to raise the temperature of 75 kg of ice at 0°C to water at 10°C is (latent heat of fusion of ice is 80 cal/g, specific heat of water is 1 cal/g °C)

Knowledge Check

  • The amount of heat required to raise the temperature of 75 kg of ice at 0^oC to water at 10^oC is (latent heat of fusion of ice is 80 cal/g, specific heat of water is 1 cal/ g^oC )

    A
    750 kcal
    B
    `6.75xx10^3kcal`
    C
    `60xx10^3kcal`
    D
    6.75 kcal

  • 50 g of copper is heated to increase its temperature by 10^@C . If the same quantity of heat is given to 10g of water, the rise in its temperature is (specific heat of copper =420J//kg^(@)//C )

    A
    `5^@C`
    B
    `6^@C`
    C
    `7^@C`
    D
    `8^@C`

    • Similar Questions

    Explore conceptually related problems

    50 gm of copper is heated to increase its temperature by 10^(@)C. If the same quantity of heat is given to 10 gm of water, the rise in its temperature is (Specific heat of copper =420 Joule-kg^(-1)@C^(-1)

    The amount of heat required to raise the temperature of 1kg of a substance by 1^(@)C is called the latent heat of the substance.

    When a calorimeter contains 40g of water at 50^(@)C , then the temperature falls to 45^(@)C in 10 minutes. The same calorimeter contains 100g of water at 50^(@)C , it takes 20 minutes for the temperature to become 45^(@)C . Find the water equivalent of the calorimeter.

    What is meant by saying that the latent heat of vaporisation of water is 22.5 xx 10^(5) J//kg ?

    A calorimeter containes 50g of water at 50^(@)C . The temperature falls to 45^(@)C in 10 minutes. When the calorimeter contains 100g of water at 50^(@)C it takes 18 minutes for the temperature to become 45^(@)C . Find the water equivalent of the calorimeter.

    What is calorific value of petroleum if 0.25 g of petroleum is burnt in a calorimeter containing 3 kg of water and having a water equivalent of 400 gm. The rise in temperature is 10^@C

    Home
    Profile