# 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?

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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?

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