Home
Class 11
PHYSICS
A vacuum flask contains 0.4 kg liquid pa...

A vacuum flask contains 0.4 kg liquid paraffin whose temperature can be increased at the rate of `1^(@)C` per minute using an immersion heater of power 12.3 W. When a heater of 19.2 W is used to heat 0.5 kg of liquid paraffin, in the same flask, the rate of rise temperature is `1.2^(@)C` per minute.
What is specific heat of the paraffin?

A

`"0.529 cal.g"^(-1).^(@)C^(-1)`

B

`"0.429 cal.g"^(-1).^(@)C^(-1)`

C

`"0.472 cal.g"^(-1).^(@)C^(-1)`

D

`"0.623 cal.g"^(-1).^(@)C^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
A
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • CALORIMETRY

    CHHAYA PUBLICATION|Exercise ENTRANCE CORNER (Intger answer type)|4 Videos

  • CALORIMETRY

    CHHAYA PUBLICATION|Exercise EXAMINATION ARCHIVE|5 Videos

  • CALORIMETRY

    CHHAYA PUBLICATION|Exercise ENTRANCE CORNER (Matrix match type)|1 Videos

  • CIRCULAR MOTION

    CHHAYA PUBLICATION|Exercise CBSE SCANNER|11 Videos

Similar Questions

Explore conceptually related problems

A vacuum flask contain 0.3 kg of liquid paraffin whose temperature can be increased at the rate of 1^(@)C per minute using an immersion heater of power 12.3W. When a 19.2 W heater is used to heat 0.4 kg of liquid paraffin, in same flask, the rate of rise of temperature is 1.2^(@)C per minute. Find the specific heat of paraffin and the thermal capacity of the flask.

A 10 Watt electric heater is used to heat a container filled with 0.5 kg of water. It is found that the temperature of water and the container rises by 3^@ K in 15 minutes. The container is then emptied, dried and filled with 2 kg of oil. The same heater now raises the temperature of container-oil system by 2^@ K in 20 minutes. Assuming that there is no heat loss in the process and the specific heat of water as 4200 Jkg^(-1) k^(-1) , the specific heat of oil in the same unit is equal to

Knowledge Check

  • A vacuum flask contains 0.4 kg liquid paraffin whose temperature can be increased at the rate of 1^(@)C per minute using an immersion heater of power 12.3 W. When a heater of 19.2 W is used to heat 0.5 kg of liquid paraffin, in the same flask, the rate of rise temperature is 1.2^(@)C per minute. What is the thermal capacity of the material of the flask?

    A
    `"17.67 cal".^(@)C^(-1)`
    B
    `"16.85 cal".^(@)C^(-1)`
    C
    `"17.01 cal".^(@)C^(-1)`
    D
    `1"16.63 cal".^(@)C^(-1)`

  • When a block of metal of specific heat "0.1 cal.g"^(-1).^(@)C^(-1) and weighing 110 g is heated to 100^(@)C and then quickly transferred to a calorimeter containing 200 g of a liquid at 10^(@)C , the resulting temperature is 18^(@)C . On repeating the experiment with 400 g of same liquid in the same calorimeter at same initial temperature, the resulting temperature is 14.5^(@)C . Find the specific heat of the liquid .

    A
    `"0.42 cal.g"^(-1).^(@)C^(-1)`
    B
    `"0.52 cal.g"^(-1).^(@)C^(-1)`
    C
    `"0.48 cal.g"^(-1).^(@)C^(-1)`
    D
    `"0.62 cal.g"^(-1).^(@)C^(-1)`

  • A 10 Watt electric heater is used to heat a container filled with 0.5 kg of water. It is found that the temperature of water and the container rises by 3 K in 15 minutes. The container is then emptied, dried and filled with 2 kg of oil. The same heater now raises the temperature of container-oil system by 2 K in 20 minutes. Assuming that there is no heat loss in the process and the specific heat of water as 4200Jkg^(-1)K^(-1) ,the specific heat of oil in the same unit is equal to

    A
    `1.50xx10^3`
    B
    `2.55xx10^3`
    C
    `3.00xx10^3`
    D
    `5.10xx10^3`

    • Similar Questions

    Explore conceptually related problems

    A 10 Watt electric heater is used to heat a container filled with 0.5 kg of water. It is found that the temperature of water and the container rises by 3, K in 15 minutes. The container is then emptied, dried and filled with 2 kg of oil. The same heater now raises the temperature of container-oil system by 2''K in 20 minutes. Assuming that there is no heat loss in the process and the specific heat of water as "4200 J . kg"^(-1).K^(-1) , the specific heat of oil in the same unit is equal to

    Water, flowing through a pipe at the rate of "0.15 kg.min"^(-1) , is heated by a 25.2 W heater. Temperature of the incoming and the outgoing water are 15.2^(@)C and 17.4^(@)C respectively. When the rate of flow of water is increased to "0.2318 kg.min"^(-1) and rate of heating to 37.8W, temperature of incoming and outgoing water remain the same. Find the specific heat capacity of water and the rate of loss of heat through the pipe.

    A geyser heats water flowing at the rate of 3.0 litres per minute from 27^(@)C to 77^(@)C . If the geyser operates on a gas burner, what is the rate of consumption of the fuel if its heat of combination is 4.0 xx 10^(4) J cdot g^(-1) ?

    A system S receives heat continuously from an electrical heater of ower 10 W. The temperature of S becomes constant at 50^@C when the surrounding temperature is 20^@C . After the heater is switched off, S cools from 35.1^@C to 34.9^@C in 1 minute. The heat capacity of S is

    When a block of metal of specific heat "0.1 cal.g"^(-1).^(@)C^(-1) and weighing 110 g is heated to 100^(@)C and then quickly transferred to a calorimeter containing 200 g of a liquid at 10^(@)C , the resulting temperature is 18^(@)C . On repeating the experiment with 400 g of same liquid in the same calorimeter at same initial temperature, the resulting temperature is 14.5^(@)C . Find the wa ter equivalent of calorimeter.

    Home
    Profile