Professor Yoffe, if you're reading this, please don't kill me with the curve. You failed me last quarter and now I have to delay my graduation and pay thousands of extra dollars. I tried really hard this quarter and I've always loved physical chemistry. 20B and Math 32A were my favorite classes but 110A was just really tough for me. Kids who took professor Baugh's class had a 50%A distribution and it's really unfair how we have to work so much harder. Please don't make me spent another quarter at UCLA, my depression is really bad and I don't want to be disowned by my family. Chinese families have really high standards.

Fuck Yoffee. Final was impossible and my TA was trash. Literally one of the worst professors ever and homework is freaking impossible. I thought Felker was bad, man this guy is trash.

Yoffe is one of the worst professors I have had in the entirety of my academic career at UCLA. The final had absolutely no relation to anything that we had learned in class, and was punishingly difficult for no other reason than the fact he wanted to bring everyone's grades down since the midterm average was too high. When people asked questions in class, he often could not give a good answer. Avoid this professor if you can.

After reading the reviews from RateMyProfessor I was scared to take Yoffe, and after the first couple weeks of Chem 110A I have to admit that I was absolutely lost. This sense of being lost was not the professor's fault, however. Thermodynamics can be inherently hard for people who haven't taken a math class in a couple years, mostly because the bulk of the class requires students to work with partial derivatives as well as other concepts of calculus (31A/B and 32A stuff). Overall Chem 110A can be seen as more of a math-based course rather than a chemistry-based course.
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With that out of the way, I believe that Professor Yoffe did a great job with the class, being that it was his first time teaching at UCLA. What I love about Yoffe is that he lives and breathes thermodynamics and you can tell that it's his lifetime passion. Whether it's his goofy UCLA Thermodynamic Club T-Shirt that he wore on the last day of class or his silly email about thermo in the Simpsons, Yoffe cares and you can really see it. He hold countless office hours, he responds to emails in the blink of an eye, and he's not afraid to notify the entire class via email about the slightest updates going on in the class (perhaps a little too much haha).
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As far as the course itself goes it was relatively simple. Yoffe would post his lecture notes online, which were borrowed from Professor Gilbart, an established thermodynamics professor at UCLA. The grading scheme consisted of Problem Sets, Question Cards, a Midterm, and a Final.
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Weekly problem sets that were assigned which were graded based on a check-plus/check/check-minus, but I found that as long as you put effort and did all the problems you should get full credit.
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Question cards are essentially an automatic 100% if you attend discussion and turn it in.
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For our section he made the midterm extremely easy with an average of 91%, however to counteract this average, he spend 27 odd hours preparing a difficult final with an average of 58%. He allows students to have two pages (front and back) for cheat sheets which are extremely useful to write down relevant equations. Tests are more mathematical and numerically driven rather than conceptual. To do well on the exams I would recommend establishing a solid basis of calculus which will make the concepts taught in class a lot easier to apply. I would also prepare for tests by reworking problem set questions (he posts the solutions online) and working through problems in the book.
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TL:DR The course itself can be difficult for students who don't have a strong math background, however, I think Professor Yoffe does a good job teaching and I admire his passion for the subject.