w = -PΔV. 350 cm2 piston 59 cm 1.3 atm

w = -PΔV. 350 cm2 piston 59 cm 1.3 atm

 

 

A chemical reaction takes place in a container of cross-sectional area 350 cm2.

As a result of the reaction, a piston is pushed out through 59 cm against an external pressure of 1.3 atm.

Calculate the work done by the system.

 

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w = -PΔV

 

 

ΔV = 350 cm2 × 59 cm

= 20650 cm3

= 20650 mL

= 20.650 L

 

 

w = -PΔV

= -(1.3 atm) (20.650 L)

= -26.845 atm•L

= -26.845 atm•L × (101.325 J / 1 atm•L)

( 참고 https://ywpop.tistory.com/6646 )

= -2720.07 J

= -2.7 kJ

 

 

답: -2.7 kJ

 

 

[ 관련 예제 https://ywpop.tistory.com/10018 ]

 

 

 

[키워드] w = -PΔV 기준문서