Question

Statement-1 : In an adiabatic process, change in internal energy of a gas is equal to work done on/by the gas in the process. Statement-2 : This is because temp.of gas remains constant in an adiabatic process.

Answer 1

Answer:

PHYSICS

Assertion

In an adiabatic process change in internal energy of a gas in equal to work done on or by the gas in the process.

Reason

Temperature of gas remains constant in an adiabatic process.

A .

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

B .

Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

C .

Assertion is correct but Reason is incorrect

D .

Both Assertion and Reason are incorrect

October 15, 2019Chandra Jawaid

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VIDEO EXPLANATION



ANSWER

In an adiabatic process, no exchange of heat takes place.

Therefore the reason is incorrect.

From the first law of thermodynamics,

Q=U+W

⟹0=U+W

⟹∣W∣=∣U∣

Hence assertion is correct.