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Thermodynamics

41 questions · Chemistry · JEE Advanced
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Thermodynamics

41 questions · Chemistry · JEE Advanced

  1. Considering ideal gas behavior, the expansion work done (in kJ) when 144 g of water is electrolyzed completely under constant pressure at 300 K is ​. Use: Universal gas constant (R) = 8.3 J K−1 mol−1; Atomic mass…2025 · Shift 1 · Q11 · Numerical
  2. Consider the following volume-temperature (V−T) diagram for the expansion of 5 moles of an ideal monoatomic gas. Considering only P−V work is involved, the total change in enthalpy (in Joule) for the… Includes diagram2024 · Shift 1 · Q8 · Numerical
  3. One mole of an ideal monoatomic gas undergoes two reversible processes (A→B and B→C) as shown in the given figure: A→B is an adiabatic process.… Includes diagram2023 · Shift 1 · Q11 · Numerical
  4. In a one-litre flask, 6 moles of A undergoes the reaction A( g)⇌P( g). The progress of product formation at two temperatures (in Kelvin), T1​ and T2​, is shown in the figure:… Includes diagram2023 · Shift 1 · Q12 · Numerical
  5. The entropy versus temperature plot for phases α and β at 1 bar pressure is given. ST​ and S0​ are entropies of the phases at temperatures T and 0 K, respectively. The transition… Includes diagram2023 · Shift 2 · Q14 · Numerical
  6. The entropy versus temperature plot for phases α and β at 1 bar pressure is given. ST​ and S0​ are entropies of the phases at temperatures T and 0 K, respectively. The transition… Includes diagram2023 · Shift 2 · Q15 · Numerical
  7. 2 molofHg(g) is combusted in a fixed volume bomb calorimeter with excess of O2​ at 298 K and 1 atm into HgO(s). During the reaction, temperature increases…2022 · Shift 1 · Q1 · Numerical
  8. The correct option(s) about entropy (S) is(are) [R= gas constant, F= Faraday constant, T= Temperature ]2022 · Shift 2 · Q10 · Multiple correct
  9. An ideal gas undergoes a reversible isothermal expansion from state I to state II followed by a reversible adiabatic expansion from state II to state III. The correct plot(s) representing the changes from state I to state III is (are) (p :…2021 · Shift 1 · Q14 · Multiple correct
  10. For the reaction, X(s) ⇌ Y(s) + Z(g), the plot of lnpθpz​ versus T104​ is given below (in solid line), where pz is the pressure (in bar) of the gas Z at temperature T and pθ… Includes diagram2021 · Shift 1 · Q7 · Numerical
  11. For the reaction, X(s) ⇌ Y(s) + Z(g), the plot of lnpθpz​ versus T104​ is given below (in solid line), where pz is the pressure (in bar) of the gas Z at temperature T and pθ… Includes diagram2021 · Shift 1 · Q8 · Numerical
  12. One mole of an ideal gas at 900 K, undergoes two reversible processes, I followed by II, as shown below. If the work done by the gas in the two processes are same, the value of lnV2​V3​​ is ​.… Includes diagram2021 · Shift 2 · Q17 · Numerical
  13. In thermodynamics, the p-V work done is given by w=−∫dVpext​ For a system undergoing a particular process, the work done is w=−∫dV(V−bRT​−V2a​) This equation is…2020 · Shift 1 · Q7 · Multiple correct
  14. Tin is obtained from cassiterite by reduction with coke. Use the data given below to determine the minimum temperature (in K) at which the reduction of cassiterite by coke would take place. At 298K:Δf​H∘[SnO2​(s)]=−581.0…2020 · Shift 2 · Q17 · Numerical
  15. Choose the reaction(s) from the following options, for which the standard enthalpy of reaction of equal to the standard enthalpy of formation.2019 · Shift 1 · Q5 · Multiple correct
  16. Which of the following statement(s) is(are) correct regarding the root mean square speed (Urms) and average translational kinetic energy (Eav) of a molecule in a gas at equilibrium?2019 · Shift 1 · Q8 · Multiple correct
  17. A reversible cyclic process for an ideal gas is shown below. Here, P,V, and T are pressure, volume and temperature, respectively. The thermodynamic parameters q,w,H and U are heat, work, enthalpy and internal energy,… Includes diagram2018 · Shift 1 · Q13 · Multiple correct
  18. For a reaction, A⇌P, the plots of [A] and [P] with time at temperature T1​ and T2​ are given below. If T2​>T1​, the correct statement(s) is (are) (Assume ΔH∘… Includes diagram2018 · Shift 2 · Q18 · Multiple correct
  19. The surface of copper gets tarnished by the formation of copper oxide. N2​ gas was passed to prevent the oxide formation during heating of copper at 1250K. However, the N2​ gas contains 1 mole % of water vapor as impurity. The…2018 · Shift 2 · Q8 · Numerical
  20. An ideal gas is expanded from (p1​,V1​,T1​) to (p2​,V2​,T2​) under different conditions. The correct statement(s) among the following is (are)2017 · Shift 1 · Q4 · Multiple correct
  21. For a reaction taking place in a container in equilibrium with its surroundings, the effect of temperature on its equilibrium constant K in terms of change in entropy is described by2017 · Shift 2 · Q14 · Multiple correct
  22. The standard state Gibbs free energies of formation of C(graphite) and C(diamond) at T=298K are Δf​G0 [C(graphite)] =0kJmol−1Δf​G0 [C(diamond)] =2.9kJmol−1 The standard state means that…2017 · Shift 2 · Q16 · MCQ
  23. One mole of an ideal gas at 300 K in thermal contact with surroundings expands isothermally from 1.0 L to 2.0 L against a constant pressure of 3.0 atm. In this process, the change in entropy of surrounding (Δ Ssurr)in JK–1 is (1L…2016 · Shift 1 · Q4 · MCQ
  24. Match the thermodynamics processes given under column I with expression given under column II Column I (A) Freezing water at 273 K and 1 atm (B) Expansion of 1 mol of an ideal gas into a vacuum under isolated conditions. (C) Mixing of…2015 · Shift 1 · Q6 · MCQ
  25. For the process H2​O(l) → H2​O(g) at T = 100oC and 1 atmosphere pressure, the correct choice is2014 · Shift 2 · Q3 · MCQ
  26. The standard enthalpies of formation of CO2​(g), H2​O(l) and glucose(s) at 25oC are –400 kJ/mol, –300 kJ/mol and –1300 kJ/mol, respectively. The standard enthalpy of combustion per gram of glucose at 25oC is2013 · Shift 1 · Q3 · MCQ
  27. Benzene and naphthalene form an ideal solution at room temperature. For this process, the true statement(s) is(are)2013 · Shift 1 · Q7 · Multiple correct
  28. A fixed mass m of a gas is subjected to transformation of states from K to L to M to N and back to K as shown in the figure. The succeeding operations that enable this transformation of states are Includes diagram2013 · Shift 2 · Q15 · MCQ
  29. A fixed mass m of a gas is subjected to transformation of states from K to L to M to N and back to K as shown in the figure. The pair of isochoric processes among the transformation of states is Includes diagram2013 · Shift 2 · Q16 · MCQ
  30. For an ideal gas, consider only P-V work in going from an initial state X to the final state Z. The final state Z can be reached by either of the two paths shown in the figure. Which of the following choice(s) is(are) correct? (Take Δ… Includes diagram2012 · Shift 1 · Q17 · Multiple correct
  31. Using the data provided, calculate the multiple bond energy (kJ mol -1) of a C≡C bond in C2​H2​. That energy is (take the bond energy of C-H bond as 350 kJ mol -1). 2C(s)+H2​(g)→C2​H2​2C(s)→2C(g)H2​(g)→2H(g)​ΔH=225 kJ mol−1ΔH=1410 kJ mol−1ΔH=330 kJ mol−1​…2012 · Shift 2 · Q10 · MCQ
  32. The reversible expansion of an ideal gas under adiabatic and isothermal conditions is shown in the figure. Which of the following statement(s) is(are) correct? Includes diagram2012 · Shift 2 · Q15 · Multiple correct
  33. Match the transformations in column I with appropriate options in column II Column I (A) CO2​(s) → CO2​(g) (B) CaCO3​(s) → CaO(s) + CO2​(g) (C) 2H → H2​(g) (D) P(white, solid) → P(red, solid) Column II (p)…2011 · Shift 2 · Q7 · MCQ
  34. The species which by definition has ZERO standard molar enthalpy of formation at 298 K is2010 · Shift 1 · Q2 · MCQ
  35. Among the following, the intensive property is (properties are)2010 · Shift 1 · Q3 · Multiple correct
  36. The bond energy (in kcal mol-1) of a C−C single bond is approximately2010 · Shift 1 · Q9 · MCQ
  37. One mole of an ideal gas is taken from a to b along two paths denoted by the solid and the dashed lines as shown in the graph below. If the work done along the solid line path is Ws ​ and that dotted line… Includes diagram2010 · Shift 2 · Q13 · Numerical
  38. In a constant volume calorimeter, 3.5 g of a gas with molecular weight 28 was burnt in excess oxygen at 298.0 K. The temperature of the calorimeter was found to increase from 298.0 K to 298.45 K due to the combustion process. Given that…2009 · Shift 2 · Q12 · Numerical
  39. Among the following, the state function(s) is(are)2009 · Shift 2 · Q6 · Multiple correct
  40. Statement 1 : There is a natural asymmetry between converting work to heat and converting heat to work. Statement 2 : No process is possible in which the sole result is the absorption of heat from a reservoir and its complete conversion…2008 · Shift 2 · Q14 · MCQ
  41. The value of log 10​ K for a reaction A⇌B is (Given : Δr​H298K∘​=−54.07 kJ mol −1, Δr​S298K∘​=10 J K −1 mol −1 and R = 8.314 J K −1 mol…2007 · Shift 1 · Q9 · MCQ