55 L atm of work is obtained when 1.0 mole of an ideal gas is compressed isothermally from
a volume of 28.5 L to 18.5 L, the constant external pressure is
(A) 5.05 atm
(B) 5.5 atm
(C) 0.05 atm
(D) 0.55 atm
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Solution
(B) 5.5 atm [1]
`W = – P_(ex).DeltaV`
`55 = - P_(ex)(18.5 – 28.5)`
`- Pex = -55/10=5.5 atm`
Concept: Chemical Thermodynamics and Energetic - Work, Heat, Energy, Extensive and Intensive Properties
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