If heat Q is added reversibly to a system at temperature T and heat `Q'` is taken away from it reversibly at temperature `T'`, then which one of the following is correct

An ideal gas is allowed to expand both reversibly and irreversibly in an isolated system. If T_(1) is initial temperature and T_(f) is the final temperature, which of the following statement is correct

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 statement is correct ?

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 statement is correct ?

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?

When heat is added to a system at constant temperature, which of the following is possible.