Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET 2004
Exam
NEET
Year
2004
Subject
Chemistry
Chapter
Thermodynamics (C)

NEET 2004 · Chemistry · Thermodynamics (C)

Considering entropy (S) as a thermodynamic parameter, the criterion...

Considering entropy (S) as a thermodynamic parameter, the criterion for the spontaneity of any process is:Considering entropy (S) as a thermodynamic parameter, the criterion for the spontaneity of any process is:Considering entropy (S) as a thermodynamic parameter, the criterion for the spontaneity of any process is:

Options

  1. AΔSsystem +ΔSsurrounding >0\Delta \mathrm{S}_{\text{system }}+\Delta \mathrm{S}_{\text{surrounding }}>0
  2. BΔSsystem −ΔSsurrounding >0\Delta \mathrm{S}_{\text{system }}-\Delta \mathrm{S}_{\text{surrounding }}>0
  3. CΔSSystem >0\Delta \mathrm{S}_{\text{System }}>0 only
  4. DΔSSurroundings >\Delta \mathrm{S}_{\text{Surroundings }}> only

Correct answer

A. ΔSsystem +ΔSsurrounding >0\Delta \mathrm{S}_{\text{system }}+\Delta \mathrm{S}_{\text{surrounding }}>0

Step-by-step solution

According to Second Law of Thermodynamics, for a spontaneous process, total change in entropy (system + surrounding) should be positive. Considering entropy (S) as a thermodynamic parameter, the criterion for the spontaneity of any process is:
Related Theory (Ref. to Fig. 28.1)Considering entropy (S) as a thermodynamic parameter, the criterion for the spontaneity of any process is:
For the latter two cases, the temperature at which the spontaneity changes will be determined by the relative magnitudes of △S\triangle S and ΔH\Delta H.
Practice Thermodynamics (C) on Quantrex Academy →

More from Thermodynamics (C)

A certain organic solvent has Δ H\_vap = 28.50\ kJ mol^ -1 and Δ S\_vap = 88.2\ J K^ -1 \… MHT CET Medical 2026Which of the following statements regarding spontaneous process is NOT true? MHT CET Medical 2026Calculate Δ H for a reaction, 2X_ (g) + Y_ (g) arrow 2Z_ (g) at 298 K if Δ U = -10.5 kJ… MHT CET Medical 2026500\ mL of nitrogen gas and 750\ mL hydrogen gas were allowed to react at 1\ bar pressure… MHT CET Medical 2026The relationship between Δ H and Δ U for the reaction, PCl_3(g) + Cl_2(g) arrow PCl_5(g)… MHT CET Medical 2026What would be the heat released in kJ when 450\ cm^3 of 0.02\ M\ H_2SO_4 is mixed with… MHT CET Medical 2026Identify from following reactions that it takes place with Δ H = Δ U . MHT CET Medical 2026Calculate the work done in the following reaction at 300\ K , A(g) + B(g) = 2C(g) [R =… MHT CET Medical 2026 Full Thermodynamics (C) list All NEET PYQs