1. A system can have higher second law efficiency than the first
law efficiency during a process hence statement is
correct(y).
2. The entropy of a system must always increase, as entropy is a
measure of energy dispersion it will always increase for an
isolated system. hence Statement is not
correct(n).
3. Adding moisture and cooling the Air at constant pressure are
the methods to obtain saturated air from the unsaturated air. Hence
statement is not correct(n).
4. During a reversible, isothermal process the entropy of air
will sometimes increase or decrease because of change in volume by
applying pressure. hence statement is not
correct(n).
