Which of the following statements/relationships is not correct in thermodynamic changes ?

Question

Which of the following statements/relationships is not correct in thermodynamic changes ? (A) Δ U=0 (isothermal reversible expansion of a gas) (B) w= -nRT ln (V2/V1) (isothermal reversible expansion of an ideal gas) (C) w= nRT ln (V2/V1) (isothermal reversible expansion of an ideal gas) (D) For a system of constant volume heat involved directly changes to internal energy

Tardigrade Admin · Accepted Answer

For isothermal reversible expansion. w=-nRT in (V2/V1)

Q. Which of the following statements/relationships is not correct in thermodynamic changes ?

$Δ U = 0$ (isothermal reversible expansion of a gas)

$w = - n RT l n \frac{V _{2}}{V _{1}}$ (isothermal reversible expansion of an ideal gas)

$w = n RT l n \frac{V _{2}}{V _{1}}$ (isothermal reversible expansion of an ideal gas)

For a system of constant volume heat involved directly changes to internal energy

For isothermal reversible expansion.
$w = - n RT$ in $\frac{V _{2}}{V _{1}}$

Q. Which of the following statements/relationships is not correct in thermodynamic changes ?

ΔU=0 (isothermal reversible expansion of a gas)

w=−nRTlnV1​V2​​ (isothermal reversible expansion of an ideal gas)

w=nRTlnV1​V2​​ (isothermal reversible expansion of an ideal gas)

For a system of constant volume heat involved directly changes to internal energy

For isothermal reversible expansion. w=−nRT in V1​V2​​

$Δ U = 0$ (isothermal reversible expansion of a gas)

$w = - n RT l n \frac{V _{2}}{V _{1}}$ (isothermal reversible expansion of an ideal gas)

$w = n RT l n \frac{V _{2}}{V _{1}}$ (isothermal reversible expansion of an ideal gas)

For isothermal reversible expansion.
$w = - n RT$ in $\frac{V _{2}}{V _{1}}$