Question 654: Thermodynamics & KTG

Question

Heat supplied $d Q=$ increased in internal energy dU is true for

Accepted Answer

Heat supplied $dQ =$ increase in internal energy $dU$.
From the
First Law of Thermodynamics
:
$ dQ = dU + dW $
where $dW = PdV$ is the work done by the system.
Isothermal process
(Option A):
Here $dT=0$, so $\Delta U = 0$. Thus $dQ = dW$.
Not equal to only $dU$. Ã¢ÂÂ
Adiabatic process
(Option B):
Here $dQ=0$. So $dU = -dW$. Not equal to only $dU$. Ã¢ÂÂ
Isobaric process
(Option C):
Pressure constant. Here $dQ = dU + PdV$. So not just $dU$. Ã¢ÂÂ
Isochoric process
(Option D):
Volume constant ($dV=0 \implies dW = 0$).
So first law Ã¢ÂÂ $dQ = dU$. Ã¢ÂÂ
Ã¢ÂÂ Correct answer:
Option D Ã¢ÂÂ Isochoric process

Answer

isothermal process.

Answer

adiabatic process.

Answer

isobaric process.

Answer

isochoric process.

Thermodynamics & KTG

Heat supplied d Q= increased in internal energy dU is true for

Choose the correct answer: