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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 given out

B

heat is taken out

C

no change in temperature, whether heat is taken in or given out

D

all of these

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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.

Specific heat of a substance at m.pt. or b.pt. for isothermal process and specific heat of a substance during adiabatic change respectively are:

SL ARORA-FLUIDS AT REST-Problem for self practice
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  5. A cylinderical vessel contaning liquid is closed by a smooth piston of...

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  6. The cross-section of two piston in hydraulic press are 2cm^(2) "and" 1...

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  7. The average mass that must be lifted by a hydraulic press is 80 "kg".I...

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  8. In a hydraulic press used for compressing cotton the area of the pisto...

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  9. An automobile sack is lifted by a hydraulic jack that consists of two ...

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  10. What is the minimum pressure required to force blood from the heart to...

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  11. A column of water 40 cm height supports a 30 cm column of an unknown l...

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  12. If the water pressure gauge shows the pressure at ground floor to be 2...

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  13. A cylinderical jar of cross-sectional area of 50 cm^(2) is filled with...

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  14. Water is filled in a flask upto a height of 20cm. The bottom of the fl...

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  15. The density of asir ner earth's surface is 1.3kgm^-3 and the atmospher...

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  16. A vertical U-tube of uniform inner cross-section contains mercury in ...

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  17. Two liquids of specific gravity 1.2 "and" 0.84 are poured into the l...

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  18. The area of cross-section of the wider tube shown in fig., is 800cm^(2...

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  19. A barometer kept in an elevator accelerating upwards reads 76 cm of Hg...

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  20. How much will a body of 70 N weight in water if it displaces 20 ml of...

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  21. A solid weighs 6 kg in air. If its density is 2000 "kg" m^(3) what wil...

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