Specific Heat Capacity

Q.

State three differences between the heat capacity and specific heat capacity.

Q.

Define the term specific heat capacity and state its S.I.unit.

Q.

Why is $C_p$ higher than $C_v$?

Q. What is latent heat of fusion or latent heat of vapourization?

Q.

The amount of heat energy required to raise the temperature of unit mass of a substance by 1 degree celsius is called _______.

1. specific heat capacity
2. latent heat of fusion
3. heat capacity
4. latent heat of vaporization

Q.

The relation between heat capacity and specific heat capacity of a substance?

1. Specific Heat capacity = Heat capacity

2. Heat capacity = Mass of the substance x Specific heat capacity

3. Specific Heat capacity = Mass of the substance x heat capacity

4. Mass of the substance = heat capacity x Specific Heat capacity

Q.

The specific heat of water is $4200\mathrm{J}{\mathrm{kg}}^{-1}{\mathrm{K}}^{-1}$ and the latent heat of ice is $3.4\times 105\mathrm{J}{\mathrm{kg}}^{-1}$.$100\mathrm{gm}$ of ice at $0°\mathrm{C}$ is placed in $200\mathrm{g}$ of water at $25°\mathrm{C}$. The amount of ice that will melt as the temperature of water reaches $0°\mathrm{C}$ is close to (in grams):

1. $63.8$

2. $64.6$

3. $61.7$

4. $69.3$

Q.

Define the term heat capacity and state its S.I.unit.

Q.

Water is used as a coolant in automobiles radiators because

Q.

Are volume fraction and mole fraction the same?

Q.

A piece of ice of mass 40g is added to 200g of water at 50 degree Celsius. Calculate the final temperature of water when all the ice has melted. Specific heat capacity of water =4200 J per kg per K and specific latent heat of fusion of ice=336*1000 J per kg.

Q.

On which of the following factors does heat depend?

1. Temperature of the body.

2. Mass of the body.

3. The material of the body.

4. The shape of the body.

Q. $50g$ of copper is heated to increase its temperature by $10{}^{\circ }C$. If the same quantity of heat is given to $10g$ of water, then the rise in its temperature (in ${}^{\circ }C$ ) is:
(Specific heat of copper$=420Jk{g}^{-1}{K}^{-1}$,
Specific heat of water $=4186Jk{g}^{-1}{K}^{-1}$)

1. 5

Q.

A liquid of mass $m$ and specific heat $c$ is at a temperature $2T$. Another liquid of mass $m/2$ and specific heat $2c$ is at a temperature $T$. If these two liquids are mixed, the resulting temperature of the mixture is:

1. $\left(\frac{2}{3}\right)T$

2. $\left(\frac{8}{5}\right)T$

3. $\left(\frac{3}{5}\right)T$

4. $\left(\frac{3}{2}\right)T$

Q.

How is heat capacity of a body related to specific heat capacity of its substance?

Q.

Name a liquid which has the highest specific heat capacity.

Q.

40 g of water at 60°C is poured into a vessel containing 50 g of water at 20°C. The final temperature recorded is 30°C. The thermal capacity of the vessel is: [Take specific heat capacity of water as 4.2J g^{-1 o}C^-1]

1. 294 J/^oC

2. 500 J/^oC

3. 4200 J/^oC

4. 300 J/^oC

Q.

The value of ∆S for the spontaneous process is

Q.

A piece of iron of mass 2.0 kg has a heat capacity of 966 J $K^{-1}$.Find:(i) heat energy needed to warm it by ${15}^{\circ }C$, and (ii) its specific heat capacity in S.I. unit

Q.

What is the reason behind quick rise in temperature of sand compared to sea?

1. Latent heat of sand is equal to latent heat of water

2. Latent heat of sand is less than that of water

3. Specific heat of sand is less than that of water

4. Specific heat of sand is equal to specific heat of water

Q.

The specific heat capacity of water is :

(a) 4200 J k$g^{-1}{K}^{-1}$ (b) 420 J k$g^{-1}{K}^{-1}$

(c) 0.42 J $g^{-1}{K}^{-1}$ (d) 4.2 J k$g^{-1}{K}^{-1}$

Q.

What is meant by saying that latent heat of vaporization of water to 226 kj/kg^-1 ?

Q.

Four identical copper cylinders are painted. If they are all heated to the same temperature and left in the vacuum which will cool most rapidly?

1. The one painted shiny white

2. The one painted rough black

3. The one painted shiny black

4. The one painted rough white

Q. Land gets heated up easily than the sea during the daytime because the specific heat capacity of the land is _____ than that of the sea.

1. less
2. more
3. same
4. unrelated to

Q.

Humidity is high in coastal regions.

1. True
2. False

Q.

Water is used in hot water bottles for fomentation.Give a reason.

Q.

What property of water makes it an effective coolant?

Q.

Write the approximate value of specific heat capacity of water in S.I.unit.

Q.

The specific heat capacity of a body depends on ___.

1. the heat given

2. the mass of the body

3. the initial temperature

4. the material it is made up of

Q.

The S.I. unit of heat capacity is :

(a) J k$g^{-1}$ (b) J $K^{-1}$

(c) J k$g^{-1}{K}^{-1}$ (d) $ca{l}^{\circ }{C}^{-1}$