Practice: 3 moles of an ideal gas are compressed isothermally at 20°C. During this compression, 1850 J of work is done on the gas. What is the change of entropy of the gas?

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Heat Engines and the Second Law of Thermodynamics | 32 mins | 0 completed | Learn |

Heat Engines & PV Diagrams | 18 mins | 0 completed | Learn |

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The Carnot Cycle | 21 mins | 0 completed | Learn |

Refrigerators | 23 mins | 0 completed | Learn |

Entropy and the Second Law of Thermodynamics | 32 mins | 0 completed | Learn |

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Concept #1: Intro to Entropy

Practice: 3 moles of an ideal gas are compressed isothermally at 20°C. During this compression, 1850 J of work is done on the gas. What is the change of entropy of the gas?

Practice: You have a block of ice at 0°C. Heat is added to the ice, causing an increase in entropy of 120J/K. How much ice melts into water in this process?

Example #1: Entropy Increase When Braking

Concept #2: Calculating Entropy Changes for Systems of Objects

Practice: A non-Carnot heat engine operates between a hot reservoir at 610K and a cold reservoir at 320K. In a cycle, it takes in 6400 J of heat and does 2200 J of work. What is the total change in entropy of the universe over the cycle?

Example #2: Entropy of Carnot Engine

0 of 7 completed

Concept #1: Intro to Entropy

Practice #1: Entropy Change of an Isothermal Compression

Practice #2: Entropy Change of Melting Ice

Example #1: Entropy Increase When Braking

Concept #2: Calculating Entropy Changes for Systems of Objects

Practice #3: Entropy Change of non-Carnot Engine

Example #2: Entropy of Carnot Engine

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