Question

A reversible heat engine absorbs an equal amount
of heat from two sources one at 600°C and another
at 300°C under this condition
Q1:What would be its maximum possible
thermal efficiency if it rejects heat to 20°C.
Also, the same reversible heat engine is used to
compress the oxygen under reversible isothermal
condition. The initial properties of the gas are 0.7
m^3 1 bar and 20°C before compression and after
compression, the final pressure becomes 10 bar.
Calculate:
Q2.The work done
Q3.The heat flow
Q4.The change of entropy

Answer 1

Answer:

i don't know sorry bro thanks for points

Answer 2

Explanation:

The novelty toy known as the drinking bird (seen in Figure 1) is an example of Carnot’s engine. It contains methylene chloride (mixed with a dye) in the abdomen, which boils at a very low temperature—about 100ºF . To operate, one gets the bird’s head wet. As the water evaporates, fluid moves up into the head, causing the bird to become top-heavy and dip forward back into the water. This cools down the methylene chloride in the head, and it moves back into the abdomen, causing the bird to become bottom heavy and tip up. Except for a very small input of energy—the original head-wetting