"Thermodynamics Question Guide: From Basics to Mas
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Course
Physics
Institution
"Delve into thermodynamics with this comprehensive question guide. Designed to take you from beginner to expert, it features questions categorized into three levels of difficulty. Level 1 questions cover foundational concepts, Level 2 delves into applications, and Level 3 presents complex challenge...
30. An adiabatic reversible process is one in which :
(1) Temperature of the system does not change
(2) The system is not closed to heat transfer
(3) There is no entropy change
(4) None of these
31. Entropy means
(1) Disorderness
(2) Randomnes
(3)Orderness
(4) both1&2
32. AS for the reaction;
MgCO,(s) ’ MgO(s) + CO,(g) will be :
(1) 0 (2) ve (3) +ve (4) o
33. When the egg is hard boiled, there is
(1) Increase in disorder
(2) Decrease in disorder
(3) No change in disorder
(4) AG is negative
34. If SO for H,, Cl, and HClare 0.13, 0.22 and
0.19 kJK- mol-l respectively. The total change in
standard entropy for the reaction
H, + Cl,’ 2HCl is:
(1) 30 JK- moli (2) 40 JK- moti
(3) 60 JK- moll (4) 20 JK- moll
35. Which has the least entropy :
(1) Graphite (2) Diamond
(3) N,g) (4) N,Og)
36. When two gases are mixed then the entropy :
(1) Remains constant
(2) Decreases
(3) Increases
(4)Becomes zero
f
liquid
37. If the enthalpy change for the transition of
entropy
water to steam is 30 kJ mol- at 27°C, the
change for the process would be (in J mol' K-);
(1) 10 (2) 1
(3) 100 (4) 0%
217
, 38. If 900 J/gof heat is exchanged at boiling point of
water, then what is increase in entropy?
(1)43.4 J/K-mole
(2) 87.2 J/K mole
(3) 900 J/K-mole
(4) Zero
39. Calculate enthalpy of vapourization per mole of
ethanol. Given AS 109,8 JK'mol-' and B.pt. of
ethanol is 78.5°C.
(1) Zero
(2)) 38.594 kJ moF!
(3) 3.85 kJ moll
(4) Some more data is required
40. The entropy of universe :
(1) Decrease and moves to zero
(2) Remains constant
(3) Increase and moves towards maximum value
(4) None of these
41. In a spontaneous irreversible process the total
entropy of the system and surroundings
(1) Remains constant
(2) Increases
(3) Decreases
(4) Zero
42. The total entropy change for a system & its
surroundings increases if the process is :
(1) Reversible (2) Irreversible
(3) Exothermic (4) Endothermic
43. In which of the following case entropy
(1) Solid changing to liquid
decreases
(2) Expansion of a gas
(3) Crystals dissolve
(4) Polymerisation
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