Quantity of Heat

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

Question 1 of 38

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

Question 2 of 38

3. 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

Question 3 of 38

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

Question 4 of 38

5. Lf symbolizes?

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

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7. State the SI UNIT of Heat capacity

Question 7 of 38

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

Question 8 of 38

9. 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 9 of 38

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

Question 10 of 38

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

Question 11 of 38

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

Question 12 of 38

13. 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 13 of 38

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

Question 14 of 38

15. 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 15 of 38

16. What takes place at a fixed temperature?

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17. What is the formula of heat capacity?

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18. Define Heat capacity?

Question 18 of 38

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

Question 19 of 38

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. 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. Lv symbolizes?

Question 22 of 38

23. Define Heat?

Question 23 of 38

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

Question 24 of 38

25. 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 25 of 38

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

Question 26 of 38

27. 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 27 of 38

28. The SI unit of specific heat capacity is:

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

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

Question 30 of 38

31. What takes place at all temperatures?

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32. Mention the applications of cooling by evaporation

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

Question 33 of 38

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

Question 34 of 38

35. Mention the factors which affect the rate of evaporation

Question 35 of 38

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

Question 36 of 38

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

Question 37 of 38

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

Question 38 of 38