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$\cdot$ Fach cycle, a certain heat engine expels 250 $\mathrm{J}$ of heat whenyou put in 325 $\mathrm{J}$ of heat. Find the efficiency of this engine andthe amount of work you get out of the 325 $\mathrm{J}$ heat input.

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$e=23 \%$74.75$J$

Physics 101 Mechanics

Chapter 16

The Second Law of Thermodynamics

Temperature and Heat

Thermal Properties of Matter

The First Law of Thermodynamics

Cornell University

Hope College

University of Winnipeg

Lectures

03:15

In physics, the second law of thermodynamics states that the total entropy of an isolated system can only increase over time. The total entropy of a system can never decrease, and the entropy of a system approaches a constant value as the temperature approaches zero.

03:25

The First Law of Thermodynamics is an expression of the principle of conservation of energy. The law states that the change in the internal energy of a closed system is equal to the amount of heat energy added to the system, minus the work done by the system on its surroundings. The total energy of a system can be subdivided and classified in various ways.

01:30

Each cycle, a certain heat…

01:17

heat engine absorbs 375 J …

00:30

Each cycle_ certain heat e…

01:13

An engine has an efficienc…

01:40

A heat engine absorbs 350 …

03:05

A heat engine had an effic…

00:53

An engine is found to have…

00:43

An engine with an efficien…

04:05

An ideal heat engine opera…

01:32

A heat engine performs 200…

01:21

(I) A heat engine does 920…

01:36

An engine absorbs three ti…

01:52

A heat engine performs $20…

00:38

What is the efficiency of …

02:07

A heat engine does $20 \ma…

01:43

A heat engine absorbs 360 …

00:42

In performing $100.0 \math…

02:13

00:57

A heat engine takes in 360…

in this problem. We know that the work is equal to the amount of heat given and the amount of heat taken away to the cold reservoir. And so were given that the heat coming in from the hot reservoir is 325 jewels and the heat going out to the cold reservoir. It is 250 Jules, but because it's leaving this system, we have to have a negative sign. So it's actually negative 250 Jules. This lets us calculate the work done in each cycle by simply adding these two numbers, and we get 75 jewels. So this system Khun do 75 jewels of work on the surroundings. Now the efficiency is defined to be the work over he taken from the horrors of war. But then substituting this value for W and here we can simplify this to be one plus the heat to the cold reservoir over the heat to the higher reservoir. And now substituting thes two values in here gives one plus. We have negative to 50 over 3 25 and this is a being 0.231 or 23 0.1% efficiency. And that's a silencer. Are these two things here

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