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As part of our free eCourse, you will have access to 120 quizzes integrated into each lesson of the eCourse for a total of 360 questions designed to test your understanding of the content covered in that lesson.

Our End-of-Lesson Quizzes are written in the same style as those written by the AAMC, the writers of the actual MCAT. Each quiz question includes answer explanations, worked math solutions, pictures, and diagrams. As an added bonus, you can review and retake quizes anytime.

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Lesson 12: Thermodynamics Part II

Thermodynamics Part II

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A researcher carries out the following reaction at two different conditions to form methane gas: 

CS₂(g) + 4H₂(g) ---> CH₄(g) + 2H₂S(g) 

In Condition 1, the reaction is performed at 80 K and 0.025 atm, and the experimenter calculates the entropy of methane to be 200 J/molᐧK. In Condition 2, methane forms at 150 K and 0.005 atm. The entropy of methane in this condition is calculated to be 188 J/molᐧK. Did the experimenter make an error in his calculations, why or why not?

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The use of gas turbine engines is the most common way for airplanes to generate thrust. The gas within these engines undergoes a series of thermodynamic processes by which it eventually returns to its original state. Which of the following must be true of the gas turbine engine system once the cycle is complete?

I. The internal energy will have increased.

II. The work done on the system will be equal to the heat added to the system.

III. The pressure and volume will not have changed. 

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A physicist conducts an experiment in which he observes a closed system containing Ne and H₂ gas particles at two different points in time. He compares the state of the system at the beginning of the experiment to the state of the system at t = 2 hours. What must be true of the system 2 hours after the start of the experiment?

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120 Lessons, 120 Quizzes

Double Check Understanding

After working through the content in each lesson of the free eCourse, students can take the corresponding End-of-Lesson Mastery Quiz to confirm that they learned the key concepts within each lesson.

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It is extremely time-consuming to find content-specific practice questions based on the concepts you are currently learning. Students use our End-of-Lesson Quizzes to practice concepts immediately, saving precious study time.

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Students love using our End-of-Lesson Quizzes during their final period of MCAT studying as a method for quickly reviewing every piece of MCAT content needed to succeed on test day.

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How we Matched up the Khan Academy Passages with the eCourse Lessons

Each lesson of the eCourse contains links to 1 to 5 Khan Academy science passages for the purpose of providing you with non-AAMC material to practice your science passage reading skills on. By completing all the linked passages within every lesson, you will have finished all the freely available Khan Academy science passages.

To match up the Khan Academy Science Passages with the eCourse lessons, we carefully examined the passage and question content of each one. Then we decided which lesson of the eCourse best correlated with that content. You may notice that some passages don’t match up perfectly with the current lesson. If they don’t match up with the current lesson, they should match up with one of the previous lessons in the module. We did this carefully so that you could practice your science passage reading skills on passages that contain the content you’ve already learned.

Why we don’t recommend non-AAMC CARS practice questions

We recommend practicing CARS by reading non-AAMC CARS passages but not doing the associated practice problems. The reason we don’t recommend doing the practice problems is because the MCAT is written by the AAMC. They have a very unique style in which they write CARS practice questions that third-party companies (try as they might) are unable to replicate. When students spend time on non-AAMC CARS practice problems, they get familiar with the wrong style of questioning, leading them to overthink and incorrectly respond to the questions written by the AAMC. Thus, it is in your best interest to solely practice on AAMC CARS practice questions.

That said, we highly recommend practicing your reading skills on non-AAMC CARS passages. In our Ultimate CARS Strategy Course, we provide you with 1,000 free CARS passages and 100+ homework assignments, giving you ample material to practice on. Reading countless passages while practicing the proper reading habits and strategies will prepare you well to conquer the CARS section as it was written by the AAMC.

Which books do the lessons match up with?

The books we use in each lesson are linked below. We plan to stick with these older editions of the books since very little has changed and the older editions are much more affordable:

First Edition of the Kaplan 7-book Series
First Edition of the Princeton 7-book Series

Do the chapters match up perfectly?

The Kaplan Books, Princeton Books, and Khan Academy Videos were all produced by different authors. For this reason, there are some chapters in the Kaplan Book or Princeton Book that are not even found in the Khan Academy Videos and vice versa. For instance, the Kaplan and Princeton Books have chapters that cover certain experimental procedures that the Khan Academy Videos do not cover.

Our goal in matching up the books with the videos was to correlate the content as best as possible while also covering ALL the content from every resource. For this reason, when nothing in the Kaplan Books matched up with one of the video playlists, instead of leaving the reading assignment for Kaplan blank, we inserted material that did not fit in anywhere else (i.e. one of those chapters on an experimental procedure that was not covered by Khan Academy). So, when the assignment doesn’t appear to match up right, please know that this was intentional.

*If you follow the reading assignments outlined, you will finish the entire Kaplan 7-book series and/or Princeton 7-book series by the time you finish all 10 content modules.

Do the sections match up perfectly?

If the sections assigned in our eCourse do not match up with the sections contained in your content review book, you may have a different edition. The sections should still match up the large majority of the time, but in the rare instance that they don’t, I’d recommend simply reading sections that do match up and saving the ones that do not for a future lesson.

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