4500J of heat was absorbed from a Carnot engine from a reservoir at 650K. The engine did some work, and discards some heat to a sink at 350K. Evaluate: (i) The heat that is discarded. (ii) The work the engine did. (iii) The efficiency of the system.

Carnot engine A has an efficiency of 0.62, and Carnot engine B has an efficiency of 0.77. Both engines utilize the same hot reservoir, which has a temperature of 642 K and delivers 1275 J of heat to each engine. Find (a), (b) the magnitude of the work produced by engine A and B respectively and (c), (d) the temperatures of the cold reservoirs that they use. (a) |WAI - i (b) |WB| = i (c) TCA = i (d) TCB = i <

Consider an inefficient engine that draws 200 J of heat from a hot reservoir at 100o C, converts 48 J to work, and rejects 152 J to a cold reservoir at 0o C. Theoretically, how much maximum work can be produced if the efficiency of the engine is maximized? How much work was lost by using this inefficient heat engine design? (Hint: Carnot Engine)

A steam engine boiler is maintained at 250°C (523K) and water is converted into steam. This steam is used to do work and heat is ejected to the surrounding air at temperature 573°C (300K). Calculate the efficiency it can have?