An ideal gas is allowed to expand both reversibly and irreversibly in an isolated system. If Ti is the i initial temperature and Tf is the final temperature, which of the following statements is correct?
a. (Tf)rev > (Tf)irrev
b. Tf = Ti for both reversible and irreversible processes
c. (Tf) irrev > (Tf) rev
d. Tf > Ti for reversible process but Tf = Ti for irreversible processes
