Q5. State whether the following are true orfalse with brief justifications:
(i) The maximum thermal efficiency for any power cycle operatingbetween two thermal reservoirs at temperaturesT1 andT2(T1 >T2) is 1-T2/T1.
(ii) Transferring heat from a cold object to a hot object isforbidden according to the Clausius statement of the secondlaw.
(iii) A cycle that does not violate the Kelvin-Planck statementcannot violate the Clausius statement of the second law.
(iv) For a reversible power cycle, if we hold the temperature ofthe cold reservoir (TC) constant,we can increase the thermal efficiency ? to anyvalue smaller than 1 (100%) by varyingTH.
(v) A system interacting with air at different heights in theatmosphere is interacting with only one thermal reservoir, i.e.,the atmosphere.
