Question

25. If 5,000. J of work were required to compress 54.0 L of a gas contained in a cylinder fitted with a weightless movable piston under an external pressure of 745 torr, then what is its final volume?

Answer 1

Here work is done on the System (compression). So final volume is less than initial volume 1 atmalltoz 101-325J. W z - Plou). 5000-I z - 745 how x lahm x (ov) inL x 101-3255 760 how larm-hi D = -50.34 L V v. 2 - 50. 36 - Sy.oL a -50.30 - a 3.7L final volume 2S 3.70. Our of clzco) 20 on nn a 4Coll a) Polsce - (one of Pal ? (-398-963) - zF1522-0 ke (-73-617) mol - 1522.0kJ x l.Kcal 4.PSYKI 2 -363.77 kcal) Althon (In Latm) 2 - 1522-OKI X l llt.atm. o.1013 25 kJ 2 -15,021 Lahm

For gaseas reaction o work done by Surrounding - Zonart onga moles of gaseous products - moles of gaseous reachanks z 4-10 -6. Tz 298K (standard Conditions) So work done on system & -ongRT - 2- x 8-314x1ő iJ x2981 moric work done z t14.865 kJ on reaction - tly.9 kJ volume 2males of gas... So moles of products less, system compressed) ao N DE z 2 2 N ott work done on system - 1522.0k + 14-9 kJ - 1507.1 1J.