A system absorbs reversibly 600 J of heat and preforms 250 J of work. The increase in the internal energy of system is

Question

A system absorbs reversibly 600 J of heat and preforms 250 J of work. The increase in the internal energy of system is (A)  850 J  (B)  250 J  (C)  600 J  (D)  350 J

Tardigrade Admin · Accepted Answer

According to first law of thermodynamics Δ U=q+W As heat is absorbed by the system, q=+q and work is done by the system, w=-W ∴ Δ U=q-W =600-250 =350 J

Q. A system absorbs reversibly $600 J$ of heat and preforms $250 J$ of work. The increase in the internal energy of system is

$850 J$

$250 J$

$600 J$

$350 J$

According to first law of thermodynamics $Δ U = q + W$ As heat is absorbed by the system, $q = + q$ and work is done by the system, $w = - W$ $∴$ $Δ U = q - W$ $= 600 - 250$ $= 350 J$

Q. A system absorbs reversibly 600J of heat and preforms 250J of work. The increase in the internal energy of system is

850J

250J

600J

350J