A fixed mass system completes an adiabatic Q0 process produc

A fixed mass system completes an adiabatic (Q=0) process producing work output. Since energy is conserved (E2 - E1 = 1Q2 - 1W2) the system energy at the final state must be -- Multiple Choice A less than the initial value B equal to the initial value c greater than the initial value d any value is possible

Solution

As it is an adiabatic system, there is no heat interaction between system and surroundings.

from the energy balance equation,

dQ=dU+dW

0=(E₂-E₁)+dW

therefore, E₂=E₁-dW

As dW is not equal to 0,

the system energy must be less than initial value.

so the option is A.