An ideal gas is allowed to expand both reversibly and irreversibly in an isolated system. If $T_i$ is the initial temperature and $T_f$ is the final temperature,which of the following statements is correct?
- A$(T_f)_{rev} = (T_f)_{irrev}$
- B$T_f = T_i$ for both reversible and irreversible processes
- C$(T_f)_{irrev} > (T_f)_{rev}$
- D$T_f > T_i$ for reversible process but $T_f = T_i$ for irreversible process
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