A system absorbs 800 joules of energy and does of work of 200 joules change in internal energy of the process is

By IUPAC conventionHeat absorbed by the system  = +VeHeat absorbed by the system  = +800 JWork done by the system = -VeWork done by the system = -200 J∆E= (+800 - 200) J∆E = +600 J .