# Answer to Question #37509 in Physical Chemistry for daryl

Question #37509

How much work is done by the system when

2.00 moles of O2 expand from a volume of

3.00 liters to a volume of 6.9 liters against a

constant external pressure of 0.0100 atm?

Answer in units of J

2.00 moles of O2 expand from a volume of

3.00 liters to a volume of 6.9 liters against a

constant external pressure of 0.0100 atm?

Answer in units of J

Expert's answer

The system is isobaric, so we can use the following equation for the work in system:

A = pΔV

p = 0.0100 atm - 1013.25 Pa; ΔV = 0.0069 - 0.0030 = 0.0039 m3

A = 1013.25*0.0039 = 3.95 J

A = pΔV

p = 0.0100 atm - 1013.25 Pa; ΔV = 0.0069 - 0.0030 = 0.0039 m3

A = 1013.25*0.0039 = 3.95 J

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