Heating Curve of Ice

Q.

The freezing point on a thermometer is marked as ${20}^{\circ }$ and the boiling point at as ${150}^{\circ }$. A temperature of ${60}^{\circ }$C on this thermometer will be read as

1. 
2. 
3. 
4. 

Q.

What is a freezing mixture? Give an example

Q.

What is the boiling point of water in kelvins?

Q. At 27 degree Celsius a gas is compressed suddenly such that pressure becomes 1/8 of its original pressure final temperature will be( gamma=5/3)

Q.

Why does our plam feel cold, when we put some acetone/petrol/perfume on it?

Q.

Explain the procedure of finding specific heat of solid experimentally.

Q.

How much heat energy is released when 5.0 g of water at ${20}^{o}C$ changes into ice at $0^{o}C$? Take specific heat capacity of water = 4.2 J $g^{-}1K^{-1}$, specific latent heat of fusion of ice = 336 J $g^{-1}$.

Q.

How much heat energy is necessary to raise the temperature of 5 kg of water

from 20^oC to 100^oC ?

Q. The melting point of a substance which contracts on melting, ______ when the pressure is increased.

1. becomes $0{}^{\circ }\text{C}$
2. does not change
3. decreases
4. increases

Q.

15 g of water at 100°C is mixed with 15 g of ice at 0°C. What is the temperature of the mixture?

1. 50° C

2. 66.6°C

3. 10°C

4. 61.3°C

Q.

Explain the method to determine the specific heat capacity of a liquid like olive oil using the method of mixtures.

Q. The change of energy on freezing 1.00kg of liquid water at 0^°C and 1 arm is .

Q.

50 g of ice 0${}^{\circ }C$ is added to 300 g of a liquid at 30${}^{\circ }C$. What will be the final temperature of the mixture when all the ice has melted? The specific heat capacity of the liquid is 2.65 $J{g}^{-1}{}^{\circ }{C}^{-1}$ while that of water is 4.2 $J{g}^{-1}{}^{\circ }{C}^{-1}$ . Specific latent heat of fusion of ice = 336 J $g^{-1}$.

1. 7⁰C

2. 5⁰C

3. 13⁰C

4. 20⁰C

Q. A piece of ice at $-{10}^{\circ }\text{C}$ is heated at a constant rate. The variation in its temperature with time, is shown in the graph below.

What is represented by the part $\text{AB}$ ?

1. The melting of ice
2. The boiling of water
3. Decline in the temperature of water
4. The heating of ice

Q.

Identify A and B in the following figure :

1. A = Gas chamber, B = Mixture

2. A = Digestor, B = Gas outlet

3. B = Gas chamber, A = Mixture

4. None of the above

Q.

Answer the following:

a. Give two examples of use of fluid pressure by us.

b.

If a pentagonal cylinder filled with water is connected with another cylinder of different volume, in which cylinder would the level of water be greater finally? Both cylinders are open at the top. [5 MARKS]

Q.

Heat energy is supplied at a constant rate to 100 g of ice at $0^{\circ }\mathrm{C}$.The ice is converted into the water at $0^{\circ }\mathrm{C}$.The ice is converted into water at $0^{\circ }\mathrm{C}$ in 2 min. How much time will be required to raise the temperature of the water from $0^{\circ }\mathrm{C}$ to ${20}^{\circ }\mathrm{C}$?

(Take, specific heat capacity of water = $4.2{\mathrm{Jg}}^{-1}{}^{\circ }\mathrm{C}^{-1}$ and latent heat of ice = $336\mathrm{J}/\mathrm{g}$)

Q. A block of ice at -${10}^{\circ }C$ is slowly heated and converted to steam at ${100}^{\circ }C$. Which of the following curves represents the phenomenon qualitatively?

1. 
2. 
3. 
4. 

Q.

Silver is a substance that expands on melting, so, its melting point ____ when pressure is raised

Q.

When ice melts without any change in temperature at its melting point

1. There is a change in the thermal potential and kinetic energy of the molecules

2. There is no change in the thermal potential and kinetic energy of the molecules

3. There is a change in the thermal potential and but not in kinetic energy of the molecules

4. There is no change in the thermal potential and but not in the kinetic energy of the molecules

Q. When salt is properly mixed with ice, then melting point of ice

1. is lowered
2. remains the same
3. is raised
4. becomes infinite

Q. Pure ice is heated to obtain pure water. The water is heated to convert it into steam. The following graph shows the pattern of the heating curves of ice and water combined.


Then, select the correct statement(s) from the following.

1. The pressure in the range QR $>1\text{atm}$
2. The MP of ice is $-5{}^{\circ }\text{C}$.
3. The BP of water is $75{}^{\circ }\text{C}$.
4. The pressure in the range PQ $>1\text{atm}$

Q.

Those liquids which can change into vapours easily are termed as __

Q.

What will be the temparature of the mixture of 1 gram of ice at 0 degree celsius 1 gram of steam at 100 degree celcius.

Q. In pressure cookers the boiling point of water increases due to the __________ created by blocking of the steam by weight.

1. heat
2. moisture
3. temperature
4. pressure

Q.

A block of ice at -${10}^{\circ }C$ is slowly heated and converted to steam at ${100}^{\circ }C$. Which of the following curves represents the phenomenon qualitatively?

1. 
2. 
3. 
4. 

Q. what is meant by long range melting point?

Q. When 1 g of ice melts at $0^{\circ }C$

1. 80 cal of heat is liberaed
2. 80 cal of heat is absorbed
3. no heat is required
4. 160 cal heat is absorbed

Q.

540 g of ice at $0^{\circ }C$ is mixed with 540 g of water at ${80}^{\circ }C$. The final temperature of the mixture is

1. 0°C

2. 40°C

3. 80°C

4. Less than 0°C

Q.

Y do we feel cold after a hailstorm and not fell cold during or before the hailstorm??

What's is Einsteins famous formula?explain and mention the formula