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Steam locomotives have an efficiency of 17.0$\%$ and operate with a hot steam temperature of $425^{\circ} \mathrm{C}$ . (a) What would the cold reservoir temperature be if this were a Carnot engine? (b) What would the maximum efficiency of this steam engine be if its cold reservoir temperature were $150^{\circ} \mathrm{C} ?$

a) $T_{c}=305^{\circ} \mathrm{C}$b) $\eta=25 \%$

Physics 101 Mechanics

Chapter 15

Thermodynamics

Thermal Properties of Matter

The First Law of Thermodynamics

The Second Law of Thermodynamics

Hope College

University of Sheffield

McMaster University

Lectures

04:16

In mathematics, a proof is…

04:48

In mathematics, algebra is…

04:21

A Carnot heat engine uses …

01:22

A gas-cooled nuclear react…

02:01

A steam engine is operated…

02:09

One of the most efficient …

02:24

03:33

32. Practical steam engine…

03:10

03:06

(a) What is the hot reserv…

06:34

(a) At a steam power plant…

01:10

A heat engine operates bet…

10:56

($a$) At a steam power pla…

02:32

05:31

02:14

A heat engine is being des…

01:18

Entropy in the Real World:…

01:15

01:14

Find the maximum (Carnot) …

01:57

The hot-reservoir temperat…

01:17

An oil-burning electric po…

07:58

A certain heat engine oper…

in this question, we are given efficiency later, which is 17% which is 170.17 So later in for Carnot engine is given by one minus T C that his cold reservoir temperature divided by heart temperature. On if you now substitute ater on find t c by th as one minus eight. How you find that it the ratio is 0.83 Now let's substitute T h because we know th th is for 25 degrees Celsius. But we must convert it into Kelvin. So adding by a factor of 2 73 this gives you the answer. 5 79 Kelvin. And in terms of degree Celsius, the answer is 30 63 Celsius. So that's sort of temperature off cold visible. If this engine was approximated as cardinals angle in part B, we are given the TC now and we are asked to find ater that his efficiency again. So T C now is 1 50 So we will convert it to kill him on DDE again. Real convert th to Kelvin as well. And if you do this calculation, you'll find that the answer is Europe on 394 which is equal to 39.4%. The answer given below the question is wrong. Thanks

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