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Important questions on Calorimetry

HARD

A copper calorimeter can with a mass of contains of ice . The system is initially at (a) If of steam at and   pressure is added to the can , what is the final temperature of the calorimeter can and its contents ? (b)  At the final temperature , how many kilograms are there of ice , how many of liquid water , and how many of steam ? 

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HARD

A aluminium calorimeter contains contains of water at . A piece of ice cooled to is placed in the calorimeter .(a) Find the final temperature of the system ,assuming no heat loss . (Assume that the specific heat of ice is .) (b) A second piece of ice at is added . How much ice remains in the system after it reaches equilibrium ? (c) Would you give a different answer for (b) if both pieces of ice were added at the same time ?

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HARD

How much heat transfer is required to raise the temperature of a aluminium pot containing of ice from to boiling point and then boil away the water? How long does it take if the rate of heat transfer is ?

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HARD

A aluminium calorimeter contains of water at An aluminium shot of mass is heated to and is then placed in the calorimeter . (a) Using the value of the specific heat of aluminium given in table find the final temperature of the system , assuming that no heat is lost to the surroundings . (b) The error due to heat transfer between the system and its surroundings can be minimized if the initial temperature of the water and calorimeter is chosen to be below room temperature , where  is the temperature change of the calorimeter and water during the measurement . Then the final temperature is above room temperature . What should be the initial temperature of the water and container if the room temperature is   

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HARD

Utensils used for efficient cooking should have

A

Large heat capacity

B

Small heat capacity

C

Medium heat capacity

D

Any heat capacity

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HARD

The diameter of a solid metallic sphere is equal to the inner diameter of a hollow metallic sphere. If inner diameter of hollow sphere is two thirds of its outer diameter. Both the spheres are made of same metal. If an equal amount of heat is supplied the both the spheres. Find the ratio of increase in temperature of the solid sphere to that of the hollow one?

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HARD

The water equivalent of a 400 g copper calorimeter (specific heat =0.1 cal/)-

A

B

C

D

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HARD

of steam at is passed into calorimeter containing liquid , Temperature of liquid rises from to . Then water equivalent of calorimeter and content is 

A

gram

B

gram

C

gram

D

gram

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HARD

A flow calorimeter is an apparatus used to measure the specific heat of a liquid . The technique of flow calorimeter involves measuring the temperature difference between the input and output points of a flowing stream of the liquid while energy is added by heat at a known rate . In one particular experiment , a liquid with a density of flows through the calorimeter at the rate of At steady state , a temperature difference of is established between the input and output points when energy is supplied by heat at the rate of . What is the specific heat of the liquid ?

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HARD

A vessel contains M grams of water at a certain temperature and water at a certain other temperatures is passed into it at a constant rate of m g/s. The variation of temperature of the mixture with time is shown in Fig. 1.90. The values of M and m are, respectively (the heat exchanged after a long time is 800 cal)

A

40 & 2

B

40 & 4

C

20 & 4

D

20 & 2

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