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Chemistry - Thermodynamics (C)

Practise 83 TS EAMCET previous year questions on Thermodynamics (C), compiled from papers spanning 2001 to 2025. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty TS EAMCET tests.

Thermodynamics (C) has been asked in 24 of the 24 years of TS EAMCET papers analysed (2001–2024), with 83 questions in all. 51% of them were easy, 43% moderate and 6% tough. Most of its questions came from 2020, with 10 questions that year. In the last three years (2022–2024) it had 21 questions across 17 papers, about 1.2 per paper.

The chapter's 5 topics are not weighted equally: Laws of Thermochemistry and Enthalpy Change (39 questions, 47%), First Law and Basic Fundamentals of Thermodynamics (18 questions, 22%), and Third law of thermodynamics (14 questions, 17%) have been asked the most. Laws of Thermochemistry and Enthalpy Change has also led over the last five years, with 12 questions. Laws of Thermochemistry and Enthalpy Change has produced the most tough questions (3).

  1. 1The entropy and enthalpy changes for the reaction at 300 K and 1 atm are respectively and -41.2 kJ. The temperature at which the reaction wi04 May, 2025 (M)Third law of thermodynamics
  2. 2The of an ideal gas is . One mole of this gas is expanded against a constant pressure of p atm. The change in temperature during expansion i04 May, 2025 (E)First Law and Basic Fundamentals of Thermodynamics
  3. 3At 298 K, if the standard Gibbs energy change of a reaction is -115 kJ, the value of will be03 May, 2025 (M)Third law of thermodynamics
  4. 4Which of the following processes are reversible? I. Vaporization of a liquid at its boiling point. II. Expansion of gas into vacuum. III. Tr03 May, 2025 (E)First Law and Basic Fundamentals of Thermodynamics
  5. 5At 298 K, the enthalpy change (in kJ ) for the reaction given below is (Given):02 May, 2025 (M)Laws of Thermochemistry and Enthalpy Change
  6. 6One mole of an ideal gas at 300 K and 20 atm expands to 2 atm under isothermal and reversible conditions. The work done by the gas is . The 02 May, 2025 (E)First Law and Basic Fundamentals of Thermodynamics
  7. 7At moles of an ideal gas at 3.0 atm pressure is compressed isothermally to one half of its volume by an external pressure of 6.0 atm . The w11 May, 2024 (M)First Law and Basic Fundamentals of Thermodynamics
  8. 8At 400 K , an ideal gas is enclosed in a vessel at a pressure of 203 kPa . What is the change in temperature required (in K ), if it occupie10 May, 2024 (M)First Law and Basic Fundamentals of Thermodynamics
  9. 9The standard enthalpy of combustion of C (graphite), (g) and respectively are and -726 . What is the standard enthalpy of formation of metha10 May, 2024 (M)Laws of Thermochemistry and Enthalpy Change
  10. 10The of and is and respectively. . What is the value of (in ?10 May, 2024 (E)Laws of Thermochemistry and Enthalpy Change
  11. 11The standard enthalpy of formation of ammonia is . What is the of the following reaction?09 May, 2024 (M)Laws of Thermochemistry and Enthalpy Change
  12. 12At 61 K , one mole of an ideal gas of 1.0 L volume expands isothermally and reversibly to a final volume of 10.0 L . What is the work done i09 May, 2024 (E)First Law and Basic Fundamentals of Thermodynamics
  13. 13For the reaction at and are . Cal and respectively. What is for the reaction at the same temperature?14 May, 2023 (M)Third law of thermodynamics
  14. 14At mole of an ideal gas is allowed to expand reversibly and isothermally from a pressure of 10 atmospheres to 1 atmosphere. The work done (i14 May, 2023 (E)First Law and Basic Fundamentals of Thermodynamics
  15. 15Enthalpy of formation of are respectively. The enthalpy of combustion of CO (in ) is13 May, 2023 (M)Laws of Thermochemistry and Enthalpy Change
  16. 16Ellingham diagram is the plot of . what are and ?13 May, 2023 (M)Third law of thermodynamics
  17. 17Observe the following properties I. Molar volume II. Mass IiI. Internal energy IV. Volume V. Enthalpy VI. Temperature VII. Density The inten13 May, 2023 (E)System and surrounding
  18. 18If 2.5 moles of an ideal gas at a certain temperature are allowed to expand isothermally and reversibly from an initial volume of to , the w12 May, 2023 (M)First Law and Basic Fundamentals of Thermodynamics
  19. 19The enthalpies of formation of gaseous and at are 82.0 and respectively. The enthalpy change of the reaction is12 May, 2023 (E)Laws of Thermochemistry and Enthalpy Change
  20. 20In the reaction at and , the internal energy change is . What will be the value of molar enthalpy change?20 Jul, 2022 (M)Laws of Thermochemistry and Enthalpy Change
  21. 21The bond enthalpies of heavy hydrogen, and are and , respectively. The of the reaction to produce is20 Jul, 2022 (E)Laws of Thermochemistry and Enthalpy Change
  22. 22Calculate the of .19 Jul, 2022 (M)Laws of Thermochemistry and Enthalpy Change
  23. 23An air bag on adiabatic expansion undergoes increase in its volume. The percentage change in pressure is19 Jul, 2022 (E)First Law and Basic Fundamentals of Thermodynamics
  24. 24If 92 g Na reacts with water in open vessel at 300 K . What is the value of work done? [Assume ideal nature of the gaseous product]18 Jul, 2022 (M)First Law and Basic Fundamentals of Thermodynamics
  25. 25The change in enthalpy H in kJmol - 1 for the reaction is Mg + 2 F MgF 2 Given: EA of F = 328 kJ mol - 1 , IE 1 of Mg = 737 kJ mol - 1 , IE 18 Jul, 2022 (E)Laws of Thermochemistry and Enthalpy Change
  26. 26A certain mass of a gas was brought from state A to B by following three different paths, namely 1 , 2 and 3 , respectively. Which of the fo18 Jul, 2022 (E)First Law and Basic Fundamentals of Thermodynamics
  27. 27Among the following given substances, the one with zero f H is18 Jul, 2022 (E)Laws of Thermochemistry and Enthalpy Change
  28. 28The following graph indicates the system containing 1 mole of gas involving various steps. When it moves from to , the type of undergoing pr06 Aug, 2021 (M)First Law and Basic Fundamentals of Thermodynamics
  29. 29Which of the following relation is correct?06 Aug, 2021 (M)Third law of thermodynamics
  30. 30Which of the following options are correct?06 Aug, 2021 (E)Third law of thermodynamics
  31. 31Which of the following is not an intensive property?05 Aug, 2021 (M)System and surrounding
  32. 32Enthalpy of hydrogenation of one mole of benzene to cyclohexane is [Resonance energy of benzene = - 150 . 4 kJ / mole . Enthalpy of hydrogen04 Aug, 2021 (M)Laws of Thermochemistry and Enthalpy Change
  33. 33Which of the following compounds has the highest standard molar entropy?04 Aug, 2021 (E)Entropy and Second law of thermodynamics
  34. 34A and B on mixing form an ideal solution at room temperature. Which of the following options is correct for this process?04 Aug, 2021 (E)System and surrounding
  35. 35of which reaction correctly represents the lattice enthalpy of ?14 Sep, 2020 (M)Laws of Thermochemistry and Enthalpy Change
  36. 36In which of the processes, the entropy will decrease14 Sep, 2020 (M)Entropy and Second law of thermodynamics
  37. 37For the reactions, What are the signs of , respectively?14 Sep, 2020 (E)Entropy and Second law of thermodynamics
  38. 38Which of the following statement is correct?14 Sep, 2020 (E)Third law of thermodynamics
  39. 39Find the value of the equilibrium constant of a reaction at , when standard Gibbs free energy change is ? (Consider )11 Sep, 2020 (M)Third law of thermodynamics
  40. 40Which of the following statements regarding the first law of thermodynamics is correct?11 Sep, 2020 (E)First Law and Basic Fundamentals of Thermodynamics
  41. 41and for a reaction are and at 1 atm pressure. The temperature at which free energy change is equal to zero and nature of the reaction below 10 Sep, 2020 (M)Third law of thermodynamics
  42. 42What will be the value, when one mole of oxygen is going from to at constant volume? (Molar heat capacity for oxygen10 Sep, 2020 (E)First Law and Basic Fundamentals of Thermodynamics
  43. 43For which of the following systems, the difference between H and U is not significant? (i) Solids (ii) Gases (iii) Mixture of gases and liqu09 Sep, 2020 (M)First Law and Basic Fundamentals of Thermodynamics
  44. 44Which of the following is not an extensive property?09 Sep, 2020 (E)System and surrounding
  45. 45What is the standard enthalpy of reaction (in kJ) when two moles of reacts with gas to give Fe metal? of and are -824.2 and respectively.06 May, 2019 (M)Laws of Thermochemistry and Enthalpy Change
  46. 46Enthalpy change for freezing of of water at and is . Calculate the internal energy change in when of water is converted into ice?04 May, 2019 (M)Laws of Thermochemistry and Enthalpy Change
  47. 47For a chemical reaction, the standard Gibbs energy change, is . What is the value of equilibrium constant (K)?04 May, 2019 (M)Third law of thermodynamics
  48. 48The heat of combustion is highest for04 May, 2019 (M)Laws of Thermochemistry and Enthalpy Change
  49. 49The increase in entropy in of a substance when it absorbs of heat energy at is04 May, 2019 (E)Entropy and Second law of thermodynamics
  50. 50Find the heat required to make water of from of ice at . (Enthalpy of fusion of ice of water )03 May, 2019 (M)Laws of Thermochemistry and Enthalpy Change

Frequently Asked Questions

1.How many questions are available for Thermodynamics (C)?

This chapter includes 83 questions compiled from TS EAMCET papers spanning 2001 to 2025.

2.Are these questions only from TS EAMCET, or from other exams too?

These are TS EAMCET questions specifically for the Thermodynamics (C) chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.

3.Is Thermodynamics (C) an important chapter for TS EAMCET Chemistry?

Thermodynamics (C) has appeared in 25 of the 25 years of TS EAMCET papers covered here, with 83 questions across 63 papers - about one per paper it appears in.

4.What is the difficulty level of Thermodynamics (C) questions in TS EAMCET?

Of the 83 questions analysed for this chapter, 51% are easy, 43% moderate and 6% tough. 2020 had the most, with 10 questions.

5.Which topics in Thermodynamics (C) should I focus on?

These topics have carried the most weightage in Thermodynamics (C):

  • Laws of Thermochemistry and Enthalpy Change - 39 questions (47%)
  • First Law and Basic Fundamentals of Thermodynamics - 18 questions (22%)
  • Third law of thermodynamics - 14 questions (17%)
  • Laws of Thermochemistry and Enthalpy Change has produced the most tough questions (3).
6.Is Thermodynamics (C)'s weightage in TS EAMCET going up or down?

Across all 63 papers analysed, Thermodynamics (C) has averaged about 1.3 questions per paper. In the last three years (2022–2024), that average has stayed about the same, at about 1.2 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.