ME 3250 Lecture Notes - Lecture 12: Isothermal Process, Intensive And Extensive Properties, Joule

• School: Oakland University
• Department: Mechanical Engineering
• Course: ME 3250
• Professor: Griel

Document Summary

Specific entropy is an intensive property of the system, like pressure and temperature true. The entropy of a closed system: can increase or decrease. The energy of an isolated system: must always remain constant. A closed system at a temperature of 127 c is immersed in surroundings at a temperature of 500 k. during a certain isothermal process, the system gains 4000 kj of energy. The change in entropy of the system is (in kj/k units) The area under a process curve on a t-s diagram is heat. The area under a process curve on a p-v diagram is work. A non-ideal air compressor requires 40 kw of power to operate, while it runs at a device efficiency of 80%. An ideal compressor under similar conditions will require: An ideal engine undergoing a reversible cyclic process receives 400 kj of heat from a. 1000k thermal reservoir, and rejects heat to a 500k thermal reservoir.