SciShow
Your Fridge Isn’t Green, but It Could Be
Refrigeration and air conditioning are among the largest sources of carbon, and the refrigerants we use are greenhouse gases, too. But green refrigerants are on the way, from elastocaloric cooling to a method a bit like salting an icy road.
Crash Course
Engines: Crash Course Physics
One of the greatest inventions is the steam engine. But why? What makes it so useful? And how does it work? In this episode of Crash Course Physics, Shini talks to us about how engines work, what makes them efficient, and why they're...
Crash Course
Why We Can't Invent a Perfect Engine: Crash Course Engineering #10
We’ve introduced the 0th and 1st laws of thermodynamics, so now it’s time to move on to the second law and how we came to understand it. We’ll explain the differences between the first and second law, and we’ll talk about the Carnot...
Khan Academy
Thermodynamic Entropy Definition Clarification, Physics
In the previous video, Sal introduced students to entropy and the 2nd Law of Thermodynamics. An example he used had a couple of points that were factual, but not clear to many students. In this video, he goes over those points again in...
Khan Academy
Khan Academy: Carnot Cycle and Carnot Engine
An introductory explanation of the Carnot Cycle and the Carnot Heat Engine. [20:52]
Khan Academy
Khan Academy: Proof: Volume Ratios in a Carnot Cycle
An explanation to prove the volume ratios in a Carnot cycle. [17:08]
Khan Academy
Khan Academy: Proof: S (Or Entropy) Is a Valid State Variable
An explanation to prove that entropy, labeled as S, is a valid state variable. [15:38]
Khan Academy
Khan Academy: Chemistry: Carnot Cycle and Carnot Engine
A video lecture discussing the four processes of the Carnot cycle. Each step of the process is described and illustrated relating the temperature change and whether heat was absorbed or released. Also explained is the P-V diagram for the...
Khan Academy
Khan Academy: Chemistry: Volume Ratios in a Carnot Cycle
A video lecture to show that the ratios between the volumes at different points in the Carnot cycle are the same. The lecture contains a lot of math to prove a simple point. While going through the math, the adiabatic processes and...
Khan Academy
Khan Academy: Chemistry: Carnot Efficiency 3
A video lecture proving the Carnot engine is the most efficient engine. The video starts by explaining the basics of heat engines and the Carnot engine. Then the video compares the efficiency of the Carnot engine and a proposed super...
Khan Academy
Khan Academy: Chemistry: Efficiency of a Carnot Engine
A video lecture defining efficiency for a heat engine and the efficiency of a Carnot engine. Using the area under the PV diagram, the lecture explains how the efficiency of an engine could be calculated. [14:04]
Khan Academy
Khan Academy: Chemistry: Carnot Efficiency 2: Reversing the Cycle
Learn how the Carnot engine is the most efficient engine in this video lecture. The lecture begins with describing a heat engine and the steps of Carnot cycle. The video also explores how the engine would need to be frictionless and...
Khan Academy
Khan Academy: Chemistry: Proof Entropy Is a Valid State Variable
A video lecture defining a state variable and the characteristics of the value. Understand that to be a valid state variable its value should remained unchanged as it goes around the Carnot cycle. Video shows the math and theory behind...
Learn Engineering
Learn Engineering: Kalina Cycle Power Plant
A video explaining how the Kalina cycle uses a mixture of two working fluids for power production. [5:43]
Khan Academy
Khan Academy: Chemistry: Thermodynamic Entropy Definition Clarification
Understand that thermodynamic entropy does not deal with the heat added and the different temperatures at which it is added but rather the reversible heat and temperature to calculate the change in entropy. This video lecture reminds...
Crash Course
Crash Course History of Science #26: Thermodynamics
It's time to heat things up! LITERALLY! It's time for Hank to talk about the history of Thermodynamics!!! It's messy and there are a lot of people who came up with some ideas that worked and others that didn't and then some ideas that...
Crash Course
Crash Course Engineering #10: Why We Can't Invent a Perfect Engine
This video will explore the difference between the first and second law, and the Carnot cycle. [12:54]
Khan Academy
Khan Academy: Carnot Cycle and Carnot Engine
Introduction to the Carnot cycle and Carnot heat engine. [20:53]
Khan Academy
Khan Academy: Carnot Efficiency 3: Proving That It Is the Most Efficient
Do you know what the most efficient engine is? This video will prove that a Carnot Engine is the most efficient engine. [12:17]
Khan Academy
Khan Academy: Proof: Volume Ratios in a Carnot Cycle
Proof of the volume ratios in a Carnot cycle. [17:08]
Khan Academy
Khan Academy: Efficiency of a Carnot Engine
Definition of efficiency for a heat engine and efficiency of a Carnot Engine. [14:04]