Doubts
Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents
Sign in to save progress →
Doubts
Sign in

Thermodynamics question

2021 · 25 Feb · Shift 2 · Q20
Guest · try one question or challengeGuest · try one question or challenge
  1. PYQ Library
  2. /JEE Main
  3. /Chemistry
  4. /Thermodynamics
  5. /2021 · 25 Feb · Shift 2 · Q20

Thermodynamics question

2021 · 25 Feb · Shift 2 · Q20

JEE MainChemistryThermodynamicsNumerical+4 / −1
Five moles of an ideal gas at 293 K is expanded isothermally from an initial pressure of 2.1 MPa to 1.3 MPa against at constant external pressure 4.3 MPa. The heat transferred in this process is ‾\underline{\hspace{2cm}}​ kJ mol −-− 1. (Rounded off to the nearest integer) [Use R = 8.314 J mol −-− 1K −-− 1]
Numerical answer
PreviousNext

More from Thermodynamics

  • At 298 K, the enthalpy of fusion of a solid (X) is 2.8 kJ mol − 1 and the enthalpy of vaporisation of the liquid (X) is 98.2 kJ mol − 1. The enthalpy of sublimation of the substance (X) in kJ mol − 1 is ​.…2021 · Numerical
  • A system does 200 J of work and at the same time absorbs 150 J of heat. The magnitude of the change in internal energy is ​ J. (Nearest integer)2021 · Numerical
  • The Born-Haber cycle for KCl is evaluated with the following data : Δf​HΘ for KCl =− 436.7 kJ mol − 1 ; Δsub​HΘ for K = 89.2 kJ mol − 1 ; Δionization​HΘ for K = 419.0…2021 · Numerical
  • For water Δ vap H = 41 kJ mol − 1 at 373 K and 1 bar pressure. Assuming that water vapour is an ideal gas that occupies a much larger volume than liquid water, the internal energy change during evaporation of water is ​…2021 · Numerical
  • For a chemical reaction A + B ⇌ C + D (Δr​HΘ = 80 kJ mol − 1) the entropy change Δr​SΘ depends on the temperature T (in K) as Δr​SΘ = 2T (J K − 1mol − 1). Minimum temperature…2021 · Numerical
  • An exothermic reaction X → Y has an activation energy 30 kJ mol − 1. If energy change Δ E during the reaction is − 20 kJ, then the activation energy for the reverse reaction in kJ is ​. (Integer…2021 · Numerical
  • The average S-F bond energy in kJ mol − 1 of SF6​ is ​. (Rounded off to the nearest integer) [Given : The values of standard enthalpy of formation of SF6​(g), S(g) and F(g) are - 1100, 275 and 80 kJ mol − 1…2021 · Numerical
  • 200 mL of 0.2 M HCl is mixed with 300 mL of 0.1 M NaOH. The molar heat of neutralization of this reaction is − 57.1 kJ. The increase in temperature in ∘ C of the system on mixing is x × 10 − 2. The value of x is ​…2021 · Numerical