Internal energy of a gas remains unchanged in (I) an isothermal process (II) an adiabatic process (III) a reversible process (IV) a cyclic process Which of the these are true?

Question

Internal energy of a gas remains unchanged in (I) an isothermal process (II) an adiabatic process (III) a reversible process (IV) a cyclic process Which of the these are true? (A) I and IV only (B) I, III and IV only (C) II and III only (D) III and IV only

Tardigrade Admin · Accepted Answer

Cyclic process Δ U=0 so elnternal energy remains constant. Isothermal process T= const. so U= constant. So Internal energy of a gas remains constant in an Isothermal and cyclic process.

Q. Internal energy of a gas remains unchanged in
(I) an isothermal process
(II) an adiabatic process
(III) a reversible process
(IV) a cyclic process
Which of the these are true?

I and IV only

I, III and IV only

II and III only

III and IV only

Cyclic process $Δ U = 0$
so elnternal energy remains constant.
Isothermal process
$T =$ const.
so $U =$ constant.
So Internal energy of a gas remains constant in an Isothermal and cyclic process.

Q. Internal energy of a gas remains unchanged in (I) an isothermal process (II) an adiabatic process (III) a reversible process (IV) a cyclic process Which of the these are true?