Quantity of Heat

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

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

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

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5. 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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6. State the SI UNIT of Heat capacity

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7. What is the formula of heat capacity?

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

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

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

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

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12. Mention the applications of cooling by evaporation

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13. Define Heat capacity?

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

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15. Define Heat?

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

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

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18. Lv symbolizes?

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19. Mention the factors which affect the rate of evaporation

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

Question 21 of 38

22. 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.

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

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

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25. 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?

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26. The SI unit of specific heat capacity is:

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

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

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

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31. What takes place at a fixed temperature?

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

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33. 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?

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34. 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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35. What takes place at all temperatures?

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

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

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38. Lf symbolizes?

Question 38 of 38