ΔE 계산. 1.90 atm 8.30 L 2.80 L 350.0 J heat internal energy

ΔE 계산. 1.90 atm 8.30 L 2.80 L 350.0 J heat internal energy

 

 

A piston is compressed from a volume of 8.30 L to 2.80 L

against a constant pressure of 1.90 atm.

In the process, there is a heat gain by the system of 350.0 J.

Calculate the internal energy change.

 

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w = –PΔV

( 참고 https://ywpop.tistory.com/5281 )

 

= –(1.90) (2.80 – 8.30)

= +10.45 atm•L

 

 

 

(+10.45 atm•L) (101.325 J / 1 atm•L)

= (+10.45) (101.325)

= +1058.846 J

 

 

 

ΔE = q + w

( 참고 https://ywpop.tistory.com/5134 )

 

= (+350.0 J) + (+1058.846 J)

= +1408.846 J

= +1.41 kJ

 

 

 

답: ΔE = +1.41×10^3 J = +1.41 kJ

 

 

 

 

[ 관련 예제 https://ywpop.tistory.com/21556 ] 745 torr 50 L 3000 J heat balloon 75 L internal energy

 

 

 

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