358. For an irreversible process, entropy change is

A.Greater than

B.Equal to 5Q

C.Less than 8Q

D.Equal to zero

359. Change of entropy depends upon

A.Change of mass

B.Change of heat

C.Change of specific heats

D.Change of pressure and volume

360. The value of Joule-Kelvin coefficient for an ideal gas is

A.1

B.Some - ve value

C.Some + ve value

D.Zero

361. A closed gaseous system unaergoes a reversible process during which 200 kcal are rejected, the volume changing from 4 m3 to 2 m3 and the pressure remaining constant at 4.27 kg/cm2. The change of internal energy will be

A.+ 10 kcal

B.- 10 kcal

C.0

D.+ 5 kcal

362. An engine operates between temperature limits of 900°K and T2 and another between T2 and 400°K. For both to be equally efficient, T2 will be equal to

A.600°K

B.650°K

C.625°K

D.700°K

363. The value of entropy at 0°C is taken as

A.1

B.Zero

C.-1

D.Some other value

364. If in previous problem, the heat rejected is 315 kcal/mt, then process will be

A.Reversible

B.Irreversible

C.Impossible

D.Hypothetical

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