Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET 2018
Exam
NEET
Year
2018
Subject
Physics
Chapter
Thermodynamics

NEET 2018 · Physics · Thermodynamics

The Volume (V) of a monoatomic gas varies with its temperature (T)...

The Volume (V)\left(V\right) of a monoatomic gas varies with its temperature \left(T\right),asshowninthegraph.Theratioofworkdonebythegas,totheheatabsorbedbyit,whenitundergoesachangefromstate, as shown in the graph. The ratio of work done by the gas, to the heat absorbed by it, when it undergoes a change from stateAtostateto stateB$, is

The Volume (V) of a monoatomic gas varies with its temperature (T) , as shown in the graph. The ratio of work done by

Options

  1. A13\dfrac{1}{3}
  2. B23\dfrac{2}{3}
  3. C25\dfrac{2}{5}
  4. D27\dfrac{2}{7}

Correct answer

C. 25\dfrac{2}{5}

Step-by-step solution

V∝TV ∝ T

⇒⇒ Isobaric process

W=P∆V=nR∆TW = P ∆ V = nR ∆ T

∆Q=nCP∆T∆ Q = n{C}_{P} ∆ T

For mono atomic gas f=3f = 3

CP=(f2R+R)=52R{C}_{P} = \left(\dfrac{f}{2}R + R\right) = \dfrac{5}{2}R

So W∆Q=nR∆TnCP∆T=25\dfrac{W}{∆ Q} = \dfrac{nR ∆ T}{n{C}_{P} ∆ T} = \dfrac{2}{5}
Practice Thermodynamics on Quantrex Academy →

More from Thermodynamics

The work done by an ideal gas during closed cycle 1arrow 2 arrow 3 arrow 4 arrow 1 as… MHT CET Medical 2026Which of the following statements is NOT CORRECT? In an isothermal process, a. there is… MHT CET Medical 2026Let η_1 be the efficiency of a Carnot engine at T_H = 547^ ^ ∘ C and T_C = 247^ ^ ∘ C… MHT CET Medical 2026Identify the INCORRECT statement for isobaric process. MHT CET Medical 2026A gas for which γ = 5 / 3 \ (γ = C_p / C_v ) is heated at constant pressure. The… MHT CET Medical 2026A mono-atomic ideal gas, initially at temperature T_1 is enclosed in a cylinder fitted… MHT CET Medical 2026A gas for which γ is 3/2 is heated at constant pressure. The percentage of heat supplied… MHT CET Medical 2026One mole of an ideal gas in initial state A undergoes a cyclic process ABCA, as shown in… MHT CET Medical 2026 Full Thermodynamics list All NEET PYQs