NCEES PE Mechanical HVAC Practice Exam Problem 27 - 1st Law for Open Systems (Solution Tips)

I made this video to clarify issues with the NCEES solution for PE Mechanical HVAC & Systems Practice Exam Problem 27.

The NCEES solution suggests that the enthalpy of the mixture is simply an average of the enthalpies of the incoming water and steam. Not showing how this equation was determined has been very confusing and the source of many questions by previous participants. And a figure like the one I show in the video would have been very helpful.

Give this problem a try, then watch the video, and let us know if you find it helpful. - Dr. Tom (AKA Dr. Thomas H. Brown, PE) DTC Founder and Mechanical Engineering Instructor

Go to https://account.ncees.org/exam-prep/ to purchase the NCEES Practice Exam for the PE exam you are taking.

You’ll find many more videos on our YouTube channel on fundamental Mechanical Engineering topics, including videos on PE Exam Strategies and sample lessons from our PE Exam Reviews. You can learn more about our reviews at our website: https://drtomsclassroom.com/mechanica...

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