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Chemical Thermodynamics

30 questions · Chemistry · IIT JAM
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Chemical Thermodynamics

30 questions · Chemistry · IIT JAM

  1. Among the following, the correct condition(s) for spontaneity is(are)2025 · Q39 · Multiple correct
  2. One mole of a monoatomic ideal gas starting from state A, goes through B and C to state D, as shown in the figure. Total change in entropy (in J K⁻¹) during this process is ​. (round off to two decimal places)… Includes diagram2025 · Q56 · Numerical
  3. A system undergoes one clockwise cycle from point X back to point X as shown in the figure below: The correct statement about this process is Includes diagram2024 · Q23 · MCQ
  4. The enthalpy change for the reaction C(g)+21​O2​(g)→CO(g) is ​ kJ per mole of CO(g) produced. (rounded off to one decimal place) [Given: C(g)+O2​(g)→CO2​(g),ΔHrxn​=−393.5 kJ per mole of CO2​(g) producedCO2​(g)→CO(g)+21​O2​(g),ΔHrxn​=283.0 kJ per mole of CO(g) produced]…2024 · Q47 · Numerical
  5. The correct relation(s) for an ideal gas in a closed system is/are2023 · Q36 · Multiple correct
  6. Consider the following reaction: 2C6​H6​+15O2​→12CO2​+6H2​OΔr​H2980​=−3120 kJ mol−1. A closed…2023 · Q44 · Numerical
  7. The volume of 2.0 mol of an ideal gas is reduced to half isothermally at 300 K in a closed system. The value of ΔG is ​ kJ.2023 · Q54 · Numerical
  8. For an N-atom nonlinear polyatomic gas, the constant volume molar heat capacity C_{v,m} has the expected value of 3(N - 1)R, based on the principle of equipartition of energy. The correct statement(s) about the measured value of C_{v,m}…2022 · Q37 · Multiple correct
  9. At constant volume, 1.0 kJ of heat is transferred to 2 moles of an ideal gas at 1 atm and 298 K. The final temperature of the ideal gas is ​ K. *(round off to one decimal place)* [Given: R = 8.314 J K^{-1} mol^{-1}]2022 · Q56 · Numerical
  10. The CORRECT Maxwell relation(s) derived from the fundamental equations of thermodynamics is (are)2021 · Q40 · Multiple correct
  11. The thermodynamic data at 298 K for the decomposition reaction of limestone at equilibrium is given below CaCO3​(s)⇌CaO(s)+CO2​(g) | Thermodynamic quantity | CaCO_{3}(s) |…2021 · Q57 · Numerical
  12. The graph that represents the temperature (T) – entropy (S) variation of a Carnot cycle is2020 · Q1 · MCQ
  13. In water, the enthalpy of a protein in its folded state (HF​) is lower than that in its unfolded state (HUF​). The entropies of the folded and unfolded states are SF​ and SUF​,…2020 · Q33 · Multiple correct
  14. The heat of formation of MgO at 300 K and 1 bar pressure is –600.60 kJ mol⁻¹. The free energy (in kJ mol⁻¹) of formation of MgO at 280 K is ​ (Round off to nearest integer) Given: In the range 280-300 K, the…2020 · Q51 · Numerical
  15. The thermodynamic criterion for spontaneity of a process in a system under constant volume and temperature and in the absence of any work other than expansion work (if any) is2019 · Q2 · MCQ
  16. One mole of an ideal gas is subjected to an isothermal increase in pressure from 100 kPa to 1000 kPa at 300 K. The change in Gibbs free energy of the system is ​ kJ mol⁻¹. (Round off to one decimal place) [Given:…2019 · Q52 · Numerical
  17. The CORRECT expression that corresponds to reversible and adiabatic expansion of an ideal gas is2018 · Q25 · MCQ
  18. The CORRECT expression(s) for isothermal expansion of 1 mol of an ideal gas is(are)2018 · Q40 · Multiple correct
  19. Consider the reaction CO(g)+21​O2​(g)⟶CO2​(g). The value of ΔU for the reaction at 300 K is -281.8 kJ mol −1. The value of ΔH at same temperature is kJ mol −1 (rounded up to the…2018 · Q47 · Numerical
  20. For the reaction H2​(g)+21​O2​(g)⟶H2​O(l), the following information is given T = 300 K ΔHˉ∘=−285 kJ mol −1SˉH2​O∘​(l)=70 J K −1 mol −1SˉO2​∘​(g)=204…2018 · Q57 · Numerical
  21. A straight line having a slope of −ΔU0/R is obtained in a plot between2017 · Q10 · MCQ
  22. Intensive variable(s) is/are2017 · Q39 · Multiple correct
  23. At 298 K and 1 atm, the molar enthalpies of combustion of cyclopropane and propene are -2091 kJ mol⁻¹ and -2058 kJ mol⁻¹, respectively. The enthalpy change (in kJ mol⁻¹) for the conversion of one mole of propene to one mole of cyclopropane…2017 · Q48 · Numerical
  24. Consider an isothermal reversible compression of one mole of an ideal gas in which the pressure of the system is increased from 5 atm to 30 atm at 300 K. The entropy change of the surroundings (in J K⁻¹) is ​…2017 · Q60 · Numerical
  25. The enthalpy of formation for CH₄(g), C(g) and H(g) are –75, 717 and 218 kJ mol⁻¹, respectively. The enthalpy of the C–H bond in kJ mol⁻¹ is __.2016 · Q50 · Numerical
  26. The ΔHo for the reaction CO(g)+21​O2​(g)→CO2​(g) at 400K in kJmol−1 is __. Given at 298 K: | | ΔHfo​ kJ mol −1 | Cpo​ J mol −1…2016 · Q58 · Numerical
  27. The correct order of entropy for various states of CO₂ is2016 · Q8 · MCQ
  28. For an isothermal free expansion of an ideal gas into vacuum, which one of the following set of values is correct?2015 · Q25 · MCQ
  29. Which of the following thermodynamic relation(s) is/are correct?2015 · Q40 · Multiple correct
  30. Two moles of an ideal gas is expanded isothermally and reversibly from 5 to 1 bar at 298 K. The change in the entropy (in J K −1) of the system is ​2015 · Q50 · Numerical