Quantity of Heat

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

Question 1 of 38

2. What takes place at all temperatures?

Question 2 of 38

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

Question 3 of 38

4. 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 4 of 38

5. Mention the factors which affect the rate of evaporation

Question 5 of 38

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

Question 6 of 38

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

Question 7 of 38

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

Question 8 of 38

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

Question 9 of 38

10. The SI unit of specific heat capacity is:

Question 10 of 38

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

Question 11 of 38

12. 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 12 of 38

13. Mention the applications of cooling by evaporation

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

Question 14 of 38

15. Lv symbolizes?

Question 15 of 38

16. 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 16 of 38

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

Question 17 of 38

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

Question 18 of 38

19. Define Heat?

Question 19 of 38

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

Question 20 of 38

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

Question 21 of 38

22. 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 22 of 38

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. Lf symbolizes?

Question 24 of 38

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

Question 25 of 38

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

Question 26 of 38

27. What is the formula of heat capacity?

Question 27 of 38

28. 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 28 of 38

29. 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 29 of 38

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

Question 30 of 38

31. 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 31 of 38

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

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

Question 33 of 38

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

Question 34 of 38

35. Define Heat capacity?

Question 35 of 38

36. State the SI UNIT of Heat capacity

Question 36 of 38

37. What takes place at a fixed temperature?

Question 37 of 38

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

Question 38 of 38