Quantity of Heat

1. The heat required to change the state of a material from solid to liquid without temperature change is called?

Question 1 of 38

2. Explain what will happen to the melting point of ice when you add impurities to it?

Question 2 of 38

3. Does an increase in pressure increase the boiling point of a liquid?

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4. Does adding impurities (salt) in a liquid raise its boiling point?

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5. Which of the following is TRUE about specific latent heat of fusion?

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6. How is the rate of evaporation affected when there is a decrease in the atmospheric pressure? It:

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7. Define Heat?

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8. What is the name given of the quantity of heat energy required to melt a unit mass of ice at constant temperature?

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9. Which among the following is an application of the effects of pressure on the melting point of ice?

Question 9 of 38

10. Lf symbolizes?

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11. When you add a significant amount of salt to water and heat the water at what boiling point will the water start to boil?

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12. What takes place at all temperatures?

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13. Define the Latent heat of vaporization (Lv) of a material?

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14. Mention the applications of cooling by evaporation

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15. Define Heat capacity?

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16. A unit mass of a material changing from liquid to solid would give out heat energy equal to its specific latent heat of fusion. True or False?

Question 16 of 38

17. During winter when icy roads are sprinkled with impurities such as salt at what melting point will the ice on the road start to melt.

Question 17 of 38

18. The general formula of determining the specific heat capacity using electrical method is: V x I x t = HEAT GAINED (MCTheta). True or False?

Question 18 of 38

19. Explain why it takes more time to prepare tea for many people as compared to preparing tea for fewer people

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20. Kindly explain the definition of the following formula: Q = MC(Theta)

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21. Mention the factors which affect the melting and boiling points of a substance

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22. What takes place at a fixed temperature?

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23. Does a decrease in pressure lower the boiling point of a liquid?

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24. Evaporation occurs when molecules at the surface of the liquid acquire sufficient kinetic energy to overcome the cohesive forces of liquid molecules and thus escape. True or False?

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25. What is the formula of heat capacity?

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26. State the reason why the continuous flow method is preferred in determining the specific heat capacity of a substance?

Question 26 of 38

27. Which of the following statements is CORRECT about specific Latent heat of vaporization of a material?

Question 27 of 38

28. Lv symbolizes?

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29. The general formula of determining the specific heat capacity of either solids or liquid is: HEAT LOSS = HEAT GAINED. True or False?

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30. State why 2 different substances i.e. iron and aluminum of the same mass when subjected to the same amount of heat acquire different temperature changes

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31. Which of the following statements is correct about the specific latent heat of fusion of a material?

Question 31 of 38

32. The quantity of heat required to change a unit mass of a material from solid to liquid without temperature change is called?

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33. The SI unit of specific heat capacity is:

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34. What takes place throughout the liquid with bubbles of steam forming all over?

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35. State the SI UNIT of Heat capacity

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36. Specific heat capacity is defined as the quantity of heat required to raise the temperature of a unit mass of a substance by one kelvin. True or False?

Question 36 of 38

37. Mention the factors which affect the rate of evaporation

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38. What takes place on the surface of the liquid and forms no bubbles?

Question 38 of 38