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

Heat and Thermodynamics question

2018 · Q151
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. /Physics
  4. /Heat and Thermodynamics
  5. /2018 · Q151

Heat and Thermodynamics question

2018 · Q151

NEETPhysicsHeat and ThermodynamicsMCQ+4 / −1
The volume (V) of a monatomic gas varies with its temperature (T), 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 state A to state B, is NEET 2018 Physics - Heat and Thermodynamics Question 28 English
  1. A
    25{2 \over 5}52​
  2. B
    23{2 \over 3}32​
  3. C
    13{1 \over 3}31​
  4. D
    27{2 \over 7}72​
View written solutionFree

Correct answer: A

Gas is monatomic, so Cp = 52R{5 \over 2}R25​R

Given process is isobaric.

∴\therefore∴ dQ = nCpdT

or dQ = n(52R)\left( {{5 \over 2}R} \right)(25​R)dT

Also, dW = PdV = nRdT (∵\because∵ PV = nRT)

∴\therefore∴ Required ratio = dWdQ{{dW} \over {dQ}}dQdW​ = nRdTn(52R)dT{{nRdT} \over {n\left( {{5 \over 2}R} \right)dT}}n(25​R)dTnRdT​ = 25{2 \over 5}52​

PreviousNext

More from Heat and Thermodynamics

  • Thermodynamic processes are indicated in the following diagram. Match the following Includes table Includes diagram2017 · MCQ
  • A gas mixture consists of 2 moles of O2 and 4 moles of Ar at temperature T. Neglecting all vibrational modes, the total internal energy of the system is2017 · MCQ
  • A carnot engine having an efficiency of 101​ as heat engine, is used as a refrigerator. If the work done on the system is 10 J, the amount of energy absorbed from the reservoir at lower temperature is2017 · MCQ
  • A gas is compressed isothermally to half its initial volume. The same gas is compressed separately through an adiabatic process until its volume is again reduced to half. Then2016 · MCQ
  • The molecules of a given mass of a gas have r.m.s. velocity of 2000 m s−1 at 27oC and 1.0 × 105 N m−2 pressure. When the temperature and pressure of the gas are respectively, 127oC and 0.05 × 105 N m−2, the r.m.s.…2016 · MCQ
  • A refrigerator works between 4oC and 30oC. It is required to remove 600 calories of heat every second in order to keep the temperature of the refrigerated space constant. The power required is (Take 1 cal = 4.2 Joules)2016 · MCQ
  • One mole of an ideal monatomic gas undergoes a process described by the equation PV3 = constant. The heat capacity of the gas during this process is2016 · MCQ
  • The temperature inside a refrigerator is t2 oC. The amount of heat delivered to the room for each joule of electrical energy consumed ideally will be2016 · MCQ