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Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 3 (60 MCQs)

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1. Which of the following laws states that energy cannot be created or destroyed, only transformed from one form to another?
2. In order for energy to be less concentrated what must be done?
3. The Father of Thermodynamics is .....
4. If the kinetic energy of the system is decreasing, which of the following phase change may occur?
5. Entropy always increases when
6. Two identical blocks of iron, one at 10 degrees C and the other at 20 degrees C, are put in contact. Suppose the cooler block cools to 5 degrees C and the warmer block warms to 25 degrees C. This would violate the
7. In an isolated system, what does the second law of thermodynamics predict about entropy?
8. In which of the following systems does mass transfer occur across the system boundary?
9. The enthalpy of formation of O$_{2}$ in its standard state is .....
10. Third law of thermodynamics provides a method to evaluate which property?
11. The second law of thermodynamics states that entropy of a system tends to .....
12. The amount of heat required to change 1 kg of liquid into gas at constant temperature is called
13. The Enthalpy of vaporisation of a substance is 8400J/mol and it's boiling pt. is-173$^\circ$C.The entropy change for vaporisation is:
14. A sample of metal has a mass of 5.2 g and absorbs 478 joules of energy as it is heated from 30.0$^\circ$C to 37.35$^\circ$C. What is the heat capacity of the metal?
15. The change of reactants into products will always be spontaneous if the products, compared to the reactants, have
16. A process that takes place at constant temperature is called
17. If Veronica increases the temperature of her gas tank, why does the pressure rise?
18. System gains 700 kJ of heat, change in internal energy of the system equal to 200 kJ. How much work is done?
19. Heat is transferred as a result of a:
20. A 15.75-g piece of iron absorbs 1086.75 joules of heat energy, and its temperature changes from 25$^\circ$C to 175$^\circ$C. Calculate the specific heat capacity of iron.
21. In a reversible process the system absorbs 600 kJ heat and performs 250 kJ work on the surroundings. What is the increase in the internal energy of the system?
22. The first Law of Thermodynamics is concerned with the conservation of:
23. At what temperature would a given reaction become spontaneous if $\Delta$H =+119kJ and $\Delta$S=+263J/K.mol
24. Work done in an isothermal reversible process is always ..... than the work done in an isothermal irreversible process.
25. The standard enthalpy of formation of NH$_{3}$ is-46 kJ mol$^{-1}$. If the enthalpy of formation of H$_{2}$ from its atoms is-436 kJ mol$^{-1}$ and that of N$_{2}$ is-712 kJ mol$^{-1}$, the average bond enthalpy of N-H bond in NH$_{3}$ is
26. Sometimes a cycle with well inflated tyres left in the Sun has its tube burst open. This is because the
27. Which of the following is an extensive property?
28. Which law helps us understand the concept of temperature and allows us to use thermometers?
29. In a closed system, if the internal energy increases by 50 J and the system does 20 J of work, what is the amount of heat added to the system?
30. Zeroth law of thermodynamics is:
31. I combine 1 kg of water at 50 degrees Celsius with 1 kg of water at 70 degrees Celsius. What is the resulting temperature of the water?
32. How much energy is required to completely boil away 150g of 10$^{o}$ C water? Use C = 4.184 J/g$^{o}$C for water, and H$_{v}$ = 2260 J/g.
33. G of water. specific heat of water is 4.184 J/g$^\circ$C. temperature changes from 25.0$^\circ$ C to 20.0$^\circ$ C, how much heat energy moves from the water to the surroundings?
34. When water is heated from 10$^\circ$C to 15$^\circ$C What is the change in temperature?
35. It states that if two thermodynamic systems are each in thermal equilibrium with a third, then they are in thermal equilibrium with each other.
36. In which of the following systems, no matter, but only heat is exchanged between system and surrounding?
37. "Lava lamps" contain colored liquids. These liquids form globs that rise to the top due to
38. When a substance or material gets hotter, it expands to a greater volume, this is called .....
39. The absolute temperature of a sample of monatomic ideal gas is doubled at constant volume. What effect, if any, does this have on the pressure and density of the sample of gas?
40. Which of the following processes is an example of an adiabatic process?
41. In Isothermal process which property remains constant
42. Energy is ..... when higher-energy particles come into contact with lower-energy particles.
43. In a commercial chemical cold pack, an inner pouch containing water is broken and the water is allowed to mix with a sample of solid ammonium nitrate. The signs of the values for $\Delta H$ $\Delta S$
44. The mechanical equivalent of heat is equal to 1 when the units are in
45. The metal skewer gets so hot that you drop your marshmallow into the campfire because of
46. A student calculates the heat of combustion of a biscuit from an experiment to be 28.5kJ /g. The packet suggest that the heat of combustion is 30.2kJ/g. What is the experimental percent error of this data?
47. When an ideal gas undergoes an adiabatic expansion, which of the following statements is true?
48. Energy is created by .....
49. The thermal energy entering the system from outside is called .....
50. The amount of heat needed to melt one mole of a substance is called:
51. The enthalpy change for a reaction does not depend upon the
52. Internal energy is
53. If 100 grams of water is to be heated from 24.0$^\circ$C to 100.0$^\circ$C to make a cup of tea, how much heat must be absorbed? The specific heat of water is 4.184 J/g$^\circ$CF G H J
54. An ideal gas is compressed to half of its initial volume by means of several processes. Which of the process result in the maximum work done on the gas?
55. This term is known as relative density
56. Which of the following is defined by the measure of the average kinetic energy?
57. What is the symbol for entropy?
58. An isolated system is one in which
59. Thermal energy reservoirs are the one which are having finite heat capacity
60. In thermodynamics, which is not a state variable
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