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Assertion: Under adiabatic free expansio...

Assertion: Under adiabatic free expansion, `((dU)/(dV))_(T)` is +ve when attractive forces are dominant between gas molecules [U,V,T respresent internal energy, volume and temperature of gas respectively]
Reason: Internal energy is a state function.

A

Statement-I is true, statement-II is true and statement-II is correct explanation for statement-I

B

Statement-I is true, statement-II is true and statement-II is NOT correct explanation for statement-I

C

Statement-I is true, statement-II is false

D

Statement-I is false, statement-II is true

Text Solution

Verified by Experts

The correct Answer is:
D
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Knowledge Check

  • A gas does 4.5 J of external work during adiabatic expansion. If its temperature falls by 2 K, then its internal energy will be

    A
    Increased by `4.5J`
    B
    Decreased by `4.5 J`
    C
    Decreased by `2.25 J`
    D
    Increased by `9.0 J`

  • An ideal gas of adiabatic exponent gamma is expanded so that the amount of heat transferred to the gas is equal to the decrease of its internal energy. Then the equation of the process in terms of the variable T and V is

    A
    `TV^((gamma -1)/(2)) = C `
    B
    `TV^((gamma -1)/(2))` = C
    C
    `TV^((gamma -1)/(4)) = C `
    D
    `TV^((gamma - 2)/(4) = C `

  • (A) : In isobaric process, during an expansion of a gas both volume and temperature of the gas increase (R ): Heat added to a gas partly gets converted into internal energy and remaining to do external work

    A
    Both (A) and(R ) are true and (R ) is the correct explanation of (A)
    B
    Both (A) and (R ) are (R ) true and is not the correct explanation of (A)
    C
    (A) is true but (R ) is false
    D
    Both (A) and (R ) are false
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