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Thermal equilibrium part 4

A piece of ic...

Question

A piece of ice is being heated till it turns to water and then to steam. Which of the following statements is true?

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Solution

When a substance gains the heat, its molecules start vibrating more rapidly.
When water converts into steam, the molecules gains the energy and started to move faster than they usually do.

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Similar questions

Q. Solve the following problems:
a. Equal heat is given to two objects A and B of mass 1 g. Temperature of A increases by 3°C and B by 5°C. Which object has more specific heat? And by what factor?
b. Liquid ammonia is used in ice factory for making ice from water. If water at 20°C is to be converted into 2 kg ice at 0°C, how many grams of ammonia are to be evaporated? (Given: The latent heat of vaporization of ammonia= 341 cal/g)
c. A thermally insulated pot has 150 g ice at temperature 0°C. How much steam of 100°C has to be mixed to it, so that water of temperature 50°C will be obtained? (Given : latent heat of melting of ice = 80 cal/g, latent heat of vaporization of water = 540 cal/g, specific heat of water = 1 cal/g °C)
d. A calorimeter has mass 100 g and specific heat 0.1 kcal/ kg °C. It contains 250 gm of liquid at 30°C having specific heat of 0.4 kcal/kg °C. If we drop a piece of ice of mass 10 g at 0°C, What will be the temperature of the mixture?

Q. A piece of ice at

0^{o} C

is heated at a constant rate and its temperature recorded at regular intervals till steam is formed at

100^{o} C

. Draw a temperature-time graph to represent the change in phase. Label the different parts of your graph.

Q. Heat is added to ice initially at

0^{o} C

until the ice changes completely into the water. The same amount of heat continues to be added to the liquid water for 15 minutes. Identify which of the following statement is true?

500 g

100 g

0^{o} C

are in a calorimeter whose water equivalent is

40 g

10 g

100^{o} C

added to it. Then water in the calorimeter is (Latent heat of ice

= 80 c a l / g

, Latent heat of steam

= 540 c a l / g

)

Q. An Insulated vessel contains

0.4 k g

0^{o} C

0.1 k g

- 15^{o} C

is put into it and steam at

100^{o} C

is bubbled into it until all ice is melted and finally the contents are liquid water at

40^{o} C

. Assume that the vessel does not give or take any heat and there is no loss of matter and heat to the surroundings. Specific heat of ice is

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

heat of fusion of water is

333 \times 10^{3} J k g^{- 1}

heat of vaporization of water is

2260 \times 10^{3} J k g^{- 1}

. The amount of steam that was bubbled into the water is :

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Thermal equilibrium part 4

Standard VII Physics

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