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. What takes place at all temperatures?

Question 2 of 38

3. The SI unit of specific heat capacity is:

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

Question 4 of 38

5. 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?

Question 5 of 38

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

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

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9. 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 9 of 38

10. Define Heat capacity?

Question 10 of 38

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

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12. State the SI UNIT of Heat capacity

Question 12 of 38

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

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

Question 15 of 38

16. 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 16 of 38

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

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

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19. Mention the factors which affect the rate of evaporation

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

Question 20 of 38

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

Question 21 of 38

22. What is the formula of heat capacity?

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

Question 23 of 38

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

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

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

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27. What takes place at a fixed temperature?

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28. 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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29. Define Heat?

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30. Lv symbolizes?

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31. 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 31 of 38

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

Question 32 of 38

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

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34. Mention the applications of cooling by evaporation

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

Question 35 of 38

36. Lf symbolizes?

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

Question 37 of 38

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

Question 38 of 38