Download App

Thermodynamics — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsThermodynamics1 Mark
Question
Assertion : An adiabatic process is an isoentropic process.
Reason : Change in entropy is zero in case of adiabatic process.
✓

Answer

(a) Change in entropy, $\Delta S=\frac{\Delta Q}{T}$. In an adiabatic change, heat transfer $\Delta Q=0 . \therefore \Delta S=0$, or $S=$ constant i.e., entropy remains constant in an adiabatic process, or an adiabatic process is an isoentropic process.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Assertion & Reason" from Thermodynamics→Thermodynamics — all question types→JEE physics STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

Assertion : A negative acceleration of a body can be associated with a 'speeding up' of the body.
Reason : Increase in speed of a moving body is independent of its direction of motion.
→
Assertion : The graph between velocity and displacement for a harmonic oscillator is a parabola.
Reason : Velocity does not change uniformly with displacement in harmonic motion.
→
Assertion : Force cannot be added to pressure.
Reason : Because their dimensions are different.
→
Assertion : It is necessary to use satellites for long distance T.V. transmission.
Reason : The television signals are low frequency signals.
→
Assertion : Earth has an atmosphere but the moon does not.
Reason : Moon is very small in comparison to earth.
→
Assertion : Radio waves can be polarised.
Reason : Sound waves in air are longitudinal in nature.
→
Assertion : Pascal law is the working principle of a hydraulic lift.
Reason : Pressure is equal to thrust per area.
→
Assertion : When a particle moves in a circle with a uniform speed, its velocity and acceleration both changes.
Reason : The centripetal acceleration in circular motion is dependent on angular velocity of the body.
→
Assertion : In adiabatic compression, the internal energy and temperature of the system get decreased.
Reason : The adiabatic compression is a slow process
→
Assertion : Sudden fall of pressure at a place indicates strom.
Reason : Air flows from higher pressure to lower pressure.
→