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This content is taken from the University of Liverpool's online course, Energy: Thermodynamics in Everyday Life. Join the course to learn more.

Skip to 0 minutes and 4 seconds Last week, I talked about the key features of a thermodynamic system. That’s a quantity of matter that can exchange energy with its environment. And we looked at how we can release energy that will do useful work for us. This week, I’m going to talk about heat and mass flows in and out of a thermodynamic system. Heat and mass both carry energy with them. And we can use their movement to our advantage, such as in heating systems and jet engines. Or, we can control them, such as in double-glazed windows.

Skip to 0 minutes and 36 seconds We will develop a special case of the first law of thermodynamics, known as the steady-flow energy equation, which allows us to perform quantitative analysis on systems with mass flows, such as hand dryers and fireman’s pumps. At the end of the week, there’ll be a summary of the course so far, a multiple choice quiz for you to test your knowledge and understanding, and we’ll launch our perpetual motion design competition.

Week 3 Introduction

Eann introduces this week’s topics: heat and mass flows. He talks about how we use heat and mass flows in heating systems, jet engines, etc. He will also cover how we control heat flows, for instance with double-glazing.

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This video is from the free online course:

Energy: Thermodynamics in Everyday Life

University of Liverpool