ΔE 계산. gas 200 J heat 1.5 atm 0.5 L to 1.0 L

ΔE 계산. gas 200 J heat 1.5 atm 0.5 L to 1.0 L

 

 

A gas absorbs 200 J of heat

and expands against the external pressure of 1.5 atm

from a volume of 0.5 L to 1.0 L.

Calculate the change in internal energy.

 

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

 

w = –PΔV

( 참고 https://ywpop.tistory.com/5281 )

 

= –(1.5) (1.0 – 0.5)

= –0.75 atm•L

 

 

 

(–0.75 atm•L) (101.325 J / 1 atm•L)

= (–0.75) (101.325)

= –76 J

 

 

 

ΔE = q + w

( 참고 https://ywpop.tistory.com/5134 )

 

= (+200 J) + (–76 J)

= +124 J

 

 

 

답: ΔE = +124 J

 

 

 

 

[키워드] 내부에너지 변화 계산 기준문서, 내부에너지 계산 기준문서, ΔE 계산 기준문서