Q Two liquids A and B have specific heat capacities 2-5 J-g -176-C-1 and 3-2 J-g -176-C respectively- nbsp-i- Which liquid is a good conductor of heat- Why- nbsp-ii- Which liquid is more suitable as a liquid in radiators for cooling- nbsp-Q- nbsp- A calorimeter of mass 60 g contains 180 g of water at 29 -176-C- Find the final nbsp-temperature of the mixture- when 37-2 g of ice at mdash-10 -176-C is added to it -specific nbsp-heat capacity of water - 4200 J-kg K- latent heat of ice - 336 x nbsp-103 J-kg- nbsp-specific heat capacity of ice - 2100 J-kg K- specific heat capacity of the nbsp-calorimeter is 0-42 J-g -176-C-1 - nbsp-Q- What are background radiations- nbsp-Q- Write an equation of an a emission from nbsp-U92238- nbsp-

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Byju's Answer

Standard XII

Chemistry

Introduction

Q Two liquids...

Question

Q Two liquids A and B have specific heat capacities 2.5 J/g $°$ $C^{- 1}$ and 3.2 J/g $°$ C respectively.
(i) Which liquid is a good conductor of heat? Why?
(ii) Which liquid is more suitable as a liquid in radiators for cooling?

Q. A calorimeter of mass 60 g contains 180 g of water at 29 $°$ C. Find the final temperature of the mixture, when 37.2 g of ice at —10 $°$ C is added to it (specific heat capacity of water = 4200 J/kg K, latent heat of ice = 336 x $10^{3}$ J/kg, specific heat capacity of ice = 2100 J/kg K, specific heat capacity of the calorimeter is 0.42 J/g $°$ $C^{- 1}$ ).

Q. What are background radiations?
Q. Write an equation of an a emission from $U_{92}^{238}$ ?

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Solution

Dear student,

(b) i The liquid with specific heat capacity 2.5 is a good conductor of heat as it requires less amount of heat to raise its temperature by one degree.
ii High specific heat liquids are used as coolants, so liquid with specific heat 3.2 is more suitable for cooling.

Post other question separately

Regards

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Similar questions

Q. A calorimeter contains

400 g

of water at a temperature of

5^{\circ} C

. Then,

200 g

of water at a temperature of

+ 10^{\circ} C

and

400 g

of ice at a temperature of

- 60^{\circ} C

are added. What is the final temperature(in

^{o} C

) of the contents of the calorimeter? Specific heat capacity of water

= 1000 c a l / k g / K

. Specific latent heat of fusion of ice

= 80 \times 1000 c a l / k g

. Relative specific heat of ice

= 0.5

Q. Calculate the mass of ice needed to cool

150

g of water contained in a calorimeter of mass

50

g at

32^{o}

C such that the final temperature is

5^{o}

C.
Specific heat capacity of calorimeter

= 0.4 J / g^{o} C

Specific heat capacity of water

= 4.2 J / g^{o} C

Latent heat capacity of ice

= 330 J / g

2 kg of ice melts when water at $100^{\circ}$ is poured in a hole drilled in a block of ice. What mass of water was used?

Given: Specific heat capacity of water=4200 J k $g^{- 1} K^{- 1}$ ,specific latent heat of ice= $336 \times 10^{3} J k g^{- 1}$ .

Q. A copper calorimeter of mass

100 g m

contains

200 g m

of a mixture of ice and water. Steam at

100^{\circ} C

under normal pressure is passed into the calorimeter and the temperature of the mixture is allowed to rise to

50^{\circ} C

. If the mass of the calorimeter and its contents is now

330 g m

, what was the ratio of ice and water in the beginning? Neglect heat losses.
Given: Specific heat capacity of copper

= 0.42 \times 10^{3} J k g^{- 1} K^{- 1}

,
Specfic heat capacity of water

= 4.2 \times 10^{3} J k g^{- 1} K^{- 1}

Specific heat of fusion of ice

= 3.36 \times 10^{5} J k g^{- 1}

Latent heat of condensation of steam

= 22.5 \times 10^{5} J k g^{- 1}

Q. A heating coil is immersed in a calorimeter of heat capacity

50 J C^{- 1}

containing

1.0

kg of a liquid of specific heat capacity

450 J K g^{- 1} C^{- 1}

. The temperature of liquid rises by

10^{o}

C when

2.0

A current is passed for the

10

minutes. Find the resistance of the coil.

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