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If specific heat of a substance is infin...

If specific heat of a substance is infinite, it means

A

heat is give out

B

heat is taken in

C

no change in temperature takes place whether heat is taken in or given out

D

all of the above

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The correct Answer is:
C
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How much heat (in joule) is required to raise the temperature of 205 g of water from 21.2^(@)C to 91.4^(@)C . Specific heate of water is 4.18 J g^(-1) .^(@)C^(-1) Strategy : The specific heat of a substance is the amount of heat required to raise the temperature of 1g of the substance by 1^(@C . Thus Specific heat = (("Amount of heat in joules"))/(("Mass of substance in grams")("Temperature change in" .^(@)C)) Rearrangement gives. Amount of heat (q) = Mass of substance (m) xx Specific heat (c ) xx Temperature change (Delta T)

Assertion : Specific heat of any substance remains constant at all temperatures. Reason : It is given by s= 1/m * (dQ)/(dt) .

If specific heat capacity of a substance in solid and liquid is proportional to the temperature of substance, then temperature Vs time plot for the substance is best present by [Assume heat is supplied to substance at constant rate and initial temperature is less than melthing pint of substance.

CP SINGH-HEAT AND CALORIMETRY-Exercise
  1. If heat is supplied to s solid its temperature (i) must increase (...

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  2. The temperature of a solid object is observed to be constant during a ...

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  3. If specific heat of a substance is infinite, it means

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  4. Boiling water is changing into steam. Under this condition the specifi...

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  5. Calorie is defined as the amount of heat required to raise temperature...

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  6. A metallic ball and highly stretched spring are made of the same mater...

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  7. A 50 kg man is running at a speed of 18 kmH^(-1) If all the kinetic en...

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  8. A ball is dropped on a floor from a height of 2.0m. After the collisio...

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  9. A lead bullet strikes against a steel plate with a velocity 200ms^-1. ...

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  10. A lead bullet penetrates into a solid object and melts. Assuming that ...

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  11. An electric kettle takes 4 A current at 220 V. How much time will it t...

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  12. Hailstone at 0^@C from a height of 1 km on an insulating surface conve...

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  13. Two bodies at different temperature are mixed in a calorimeter.Which o...

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  14. A liquid of mass m and specific heat c is heated to a temperature 2T. ...

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  15. Two liquids A and B are at 30^@C and 20^@C, respectively When they are...

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  16. A vessel contains 110 g of water. The heat capacity of the vessel is e...

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  17. The temperature of equal masses of three different liquids A, B and C ...

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  18. Heat is supplied to a certain homogeneous sample of matter, at a unifo...

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  19. A solid material is supplied with heat at a constant rate. The tempera...

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  20. Two bodies of equal mass m are heated at a uniform rate under identica...

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