Question

Multiple choice questions (Explanation Requried)

(1). The work between two specified states of a closed system is the same regardless of the nature of the system and the pass of the process if the process is
(A) Isobaric.
(B) Isochoric.
(C) Isothermal.
(D) Adiabatic.
(E) All of the above.

(2). For a closed system undergoing a cycle the following may differ from zero…
(A) Total energy of the system at any time instant.
(B) Change in total energy of the system over the cycle.
(C) Change in the internal energy of the system over the cycle.
(D) Work transfer over the cycle.
(E) Heat transfer over the cycle.

Answer 1

"No heat add or reject from system Work done during adiabatic pressure P_1 V_1 - P_2 V_2/n - 1 [n = adiabatic index] so, we can see, work done in adiabatic process is depend an end paints and adiabatic index. \r\n so, whatever the path at process for same start and end points work done remains same. \r\n For closed system undergoing a cycle: total energy and internal energy are the property at system. So, charge over cycle for a property is ""zero"", [cyclic sun of [cyclic sum of work] Total energy at the system at any time instant, is not zero. Bkc implies always zero due implies may be zero or may be not zero. A implies Never be zero. "