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(a) What do you understand by the change...

(a) What do you understand by the change of phase of a substance ?
(b) Is there any change in temperature during the change of phase ?
(c) Does the substance absorb or liberate any heat energy during the change of phase ?
(d) What is the name given to the energy absorbed during a phase change ?

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ICSE-CALORIMETRY-EXERCISE-11(B)
  1. (a) What do you understand by the change of phase of a substance ? ...

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  2. A substance changes from its solid state to the liquid state when heat...

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  3. A substance on heating, undergoes (i) a rise in its temperature, (ii) ...

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  4. How does the (a) average kinetic energy (b) average potential energy o...

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  5. State the effect of presence of impurity on the melting point of ice. ...

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  6. State the effect of increase of pressure on the melting point of ice.

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  7. The diagram in Fig. 11.8 below shows the change of phases of a substan...

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  8. 1 kg of ice at 0^@C is heated at a constant rate and its temperature i...

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  9. Explain the terms boiling and boiling point. How is the volume of wate...

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  10. How is the boiling point of water affected when some salt is added to ...

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  11. What is the effect of increase in pressure on the boiling point of a l...

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  12. Water boils at 120^@C in a pressure cooker. Explain the reason.

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  13. Write down the approximate range of temperature at which water boils i...

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  14. It is difficult to cook vegetables on hills and mountains. Explain the...

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  15. Complete the following sentences : When ice melts, its volume........

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  16. Complete the following sentences : Decrease in pressure over ice ....

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  17. Complete the following sentences : Increase in pressure .............

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  18. Complete the following sentences : A pressure cooker is based on t...

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  19. Complete the following sentences : The boiling point of water is d...

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  20. Complete the following sentences : Water can be made to boil at 11...

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