Question
“would the first blank where it asks for the Air BTU/CF-DegF be solved by dividing the air specific heat by the air density?”
Response
There are several ways to address this kind of problem where you’re facing new material.
1) Check the units. Given the information available what combination produces the units of the desired answer. In this case that’s BTU/CF-DegF.
2) Think about the physical reality – the more meaningful approach. I suggest thinking about one cubic foot of air.
- What do we know about it?
- It has a mass, which we can calculate with the given information
- It will take a amount of heat to raise it one degF
- We can calculate that if we know the mass because of the other given information
- With those two you have the answer
- The same approach will give you answers to the other parts.
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