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화학/열역학

PV-work. 5.0 atm 12.0 L 14.5 L expand work (kJ)

by 영원파란 2022. 9. 12.
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PV-work. 5.0 atm 12.0 L 14.5 L expand work (kJ)

 

 

어떤 반응이 외부 압력 5.0 atm에 대응하여

부피가 12.0 L에서 14.5 L로 팽창할 때 행한 일(kJ)

 

 

Calculate the work (in kJ) done during a reaction

in which the volume expands from 12.0 L to 14.5 L

against an external pressure of 5.0 atm.

 

---------------------------------------------------

 

w = –P•ΔV

( 참고 https://ywpop.tistory.com/5281 )

 

= –(5.0 atm) (14.5 – 12.0 L)

= –12.5 atm•L

 

 

 

1 atm•L = 101.325 J 이므로,

( 참고 https://ywpop.tistory.com/6646 )

 

–12.5 atm•L × (101.325 J / 1 atm•L)

= –1.27×10^3 J

= –1.27 kJ

 

 

 

답: –1.3 kJ

 

 

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