[ENCH 427] - Final Exam Guide - Comprehensive Notes for the exam (90 pages long!)

• School: University of Calgary
• Department: Chemical Engineering
• Course: ENCH 427
• Professor: Maen Husein

Document Summary

For a defined system, esys= energy transfer across boundaries. Change in u causing change in temperature sensible heat. Change in u causing phase change latent heat. Since ideal gas has no intermolecular forces, its potential energy=const. Only heat and work can transfer across boundaries. Work: mechanical (expansion/compression, rotating shaft), electrical and magnetic. Convention: work is (+) when energy transferred form surroundings to system. Shaft work ws: delivered by rotating shaft. E. g. turbine: converts internal energy of working fluid into work. Heat q: energy transfer driven by temperature gradient. Convention: (+) is transfer from surroundings to system. A process is irreversible if, after the process occurs, the system can be returned to its original state without any net effect on the surroundings. This result occurs only when the driving force is infinitesimally small . Force is driving force of mechanical work. Temperature difference is driving force of energy transfer.