JEE MAIN - Chemistry (2006 - No. 2)
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?
(Tf)irrev > (Tf)rev
(Tf)rev = (Tf)irrev
Tf > Ti
for reversible process but Tf = Ti
for irreversible process
Tf = Ti for both reversible and irreversible processes
Uitleg
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,
$$\,\,\,\,\,\,\,\,\,\,\,$$ $${T_f}\left( {rev.} \right) < {T_f}\left( {irr.} \right)$$
$$\,\,\,\,\,\,\,\,\,\,\,$$ $${T_f}\left( {rev.} \right) < {T_f}\left( {irr.} \right)$$