Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Thermodynamics question

2020 · Q109
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /NEET
  3. /Chemistry
  4. /Thermodynamics
  5. /2020 · Q109

Thermodynamics question

2020 · Q109

NEETChemistryThermodynamicsMCQ+4 / −1
The correct option for free expansion of an ideal gas under adiabatic condition is :
  1. A
    q = 0, Δ\DeltaΔ T < 0 and w > 0
  2. B
    q < 0, Δ\DeltaΔ T = 0 and w = 0
  3. C
    q > 0, Δ\DeltaΔ T > 0 and w > 0
  4. D
    q = 0, Δ\DeltaΔ T = 0 and w = 0
View written solutionFree

Correct answer: D

Free expansion, so pex = 0
So, w = −-− pexΔ\Delta Δ V = 0
Since, adiabatic process, so q = 0
Since both q and w are equal to zero. Then according to first law of thermodynamics Δ\Delta Δ E = q + w
Δ\Delta Δ U = 0
Hence, Δ\Delta Δ T = 0

PreviousNext

More from Thermodynamics

  • Hydrolysis of sucrose is given by the following reaction. Sucrose + H2O ⇌ Glucose + Fructose If the equilibrium constant (Kc) is 2 × 1013 at 800 K, the value of ΔrGΘ at the same temperature will be :2020 · MCQ
  • For the reaction, 2Cl(g) → Cl2(g), the correct option is :2020 · MCQ
  • In which case change in entropy is negative?2019 · MCQ
  • Under isothermal condition, a gas at 300 K expands from 0.1 L to 0.25 L against a constant external pressure of 2 bar. The work done by the gas is [Given that 1 L bar = 100 J]2019 · MCQ
  • The bond dissociation energies of X2 , Y2 and XY are in the ratio of 1 : 0.5 : 1. ΔH for the formation of XY is –200 kJ mol–1. The bond dissociation energy of X2 will be2018 · MCQ
  • For a given reaction, ΔH = 35.5 kJ mol−1 and ΔS = 83.6 J K−1 mol−1. The reaction is spontaneous at (Assume that ΔH and ΔS do not vary with temperature.)2017 · MCQ
  • A gas is allowed to expand in a well insulated container against a constant external pressure of 2.5 atm from an initial volume of 2.50 L to a final volume of 4.50 L. The change in internal energy ΔU of the gas in joules will be2017 · MCQ
  • The correct thermodynamic conditions for the spontaneous reaction at all temperatures is2016 · Multiple correct