CHE330 Lecture Notes - Lecture 6: Isothermal Process, Ideal Gas, Patent Attorney
20 Mar 2015
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Second law: a rigid vessel of 0. 06 m3 volume contains an ideal gas, cv = (5/2)r, at 500 k and 1 bar. (a) (b) If heat in the amount of 15,000 j is transferred to the gas, determine its entropy change. 14 one mol of ideal gas is compressed isothermally but irreversibly at 130 c from 2. 5 to 6. 5 bar in a piston/cylinder device. The work required is 30% greater than the work of reversible isothermal compression. During the compression, heat transfers from the gas to a heat reservoir at 25 c. Calculate the entropy changes of the gas, the heat reservoir, and stotal. 15 you are a patent attorney examining an invention disclosure for a cyclic engine which exchanges heat with reservoirs at 25 c and 250 c. 0. 45 kj of work for each kj of heat extracted from the hot reservoir. 16 an inventor has devised a process in which 1 mol of air is the working fluid.
