2. The combustion process in a diesel engine may be modeled as an isobaric heat addition process. The cylinder contents may be approximated as van der Walls gas. The temperature and total volume of the engine cylinder before combustion are 950 K and 75 cm, while total volume after combustion is 150 cm. If for every 22 kg of air 1 kg of diesel fuel is used for combustion, determine the work done by the engine.