One mole of an ideal gas at 350 K is in a 2.0 L vessel of thermally conducting walls, which are in contact with the surroundings. It undergoes isothermal reversible expansion from 2. 0 L to 3.0 L against a constant pressure of 4 atm. The change in entropy of the surroundings ( 
S) is_____J K -1 (Nearest integer)
Given: R = 8. 314 J K -1 mol -1 .
Text Solution
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The first law of thermodynamics for isothermal process Q=-W
The W for isothermal reversible process is
= -1 x8.314x 2.303 x log 
= -3.37 JK -1
The given process is mentioned as isothermal reversible process hence the 
is calculated.
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