Identify the following processes each of which occurs in a closed system. Consider only pressure-volume work is perforemd in these processes.
(a) `q=0,wgt0,DeltaU=0`
(b) `qgt0,DeltaU gt0,w=0`.

For a process occurring in a closed system, DeltaU=q . If only pressure-volume work is performed by the system then which type of process is this?

Give an example of a process where q=0

DeltaE = 0 , for which process(s)?

Which one of the following relation or expression is true for a spontaneous process of DeltaG=0,DeltaH=TDeltaS,DeltaG gt0,DeltaGlt0 ?

Which of the following conditions favours the spontaneity of a reaction at a constant temperature and pressure? DeltaH gt0, DeltaH lt 0, DeltaS gt0, DeltaS lt 0 .

For an isolated system, DeltaU = 0 , then

Which condition does not satisfy the spontaneity criteria ofa reaction at constant temperature and pressure (1) Delta H lt 0, DeltaS lt 0 , (2) Delta Hgt0,DeltaS lt 0 (3) DeltaH gt 0,DeltaS gt0 , (4) DeltaH lt0,DeltaS gt0 ?

For a closed system, determine the change in internal energy (DeltaU) when (a) q cal of heat is absorbed by the system and w cal of work is performed on the system (b) q cal of heat is absorbed by the system and w cal of work is performed by the system (c) q cal of heat is evolved by the system and w cal of work is performed on the system (d) heat is not absorbed or evolved by the system, but w cal of work is performed by the system.

If theta in (-pi, 2 pi) then the interval in which cos theta gt0 is

The results obtained by applying the mathematical form of the first law of thermodynamics for different process are given below. Identify the process (w=P-V work only): DeltaU=0, q+w=0