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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 in

C

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

D

all of above

Text Solution

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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.

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