An ideal gas is allowed to expand both reversibly and irreversibly in an isolated system. If Ti is the initial temperature and Tf is the final temperature, which of the following statements is correct? [2006]a)(Tf)rev = (Tf)irrevb)Tf = Ti for both reversible and irreversible processesc)(Tf)irrev andgt; (Tf)revd)Tf andgt; Ti for reversible process but Tf = Ti for irreversible processCorrect answer is option 'C'. Can you explain this answer?

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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? [2006]

a)
(T_f)_rev= (T_f)_irrev
b)
T_f = T_ifor both reversible and irreversible processes
c)
(T_f)_irrev > (T_f)_rev
d)
T_f> T_i for reversible process but T_f = T_ifor irreversible process

Correct answer is option 'C'. Can you explain this answer?

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An ideal gas is allowed to expand both reversibly and irreversibly in ...

NOTE : In a reversible process the work done is greater than in irreversible process. Hence the heat absorbed in reversible process would be greater than in the latter case. So
T_f(rev.) < T_f(irr.)

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An ideal gas is allowed to expand both reversibly and irreversibly in an isolated system. If Ti is the initial temperature and Tf is the final temperature, which of the following statements is correct? [2006]a)(Tf)rev = (Tf)irrevb)Tf = Ti for both reversible and irreversible processesc)(Tf)irrev > (Tf)revd)Tf > Ti for reversible process but Tf = Ti for irreversible processCorrect answer is option 'C'. Can you explain this answer?

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