Question
(a) Suppose you want to design a steam engine that has heat transfer to the environment at $270^\circ\textrm{C}$ and has a Carnot efficiency of 0.800. What temperature of hot steam must you use? (b) What is unreasonable about the temperature? (c) Which premise is unreasonable?
1. $2440^\circ\textrm{C}$
2. This temperature is higher than the melting point of iron ($1510^\circ\textrm{C}$) and of steel (typically $1370^\circ\textrm{C}$)
3. An efficiency of 0.80 is too high, as is the temperature of the environment ($270^\circ$\textrm{C}\$)
Solution Video