Reviewing for the FE exam, came across questionable thermo problem.by jasc15 Tags: exam, questionable, reviewing, thermo 

#1
Apr408, 12:18 PM

P: 156

Im studying for the Fundamentals of Engineering exam (coming up April 12!!) and came across this Thermodynamics problem in my review book.
In the solution to the problem, the RT_{A} term is replaced with P_{A}*V_{A}, where it should be (P_{A}*V_{A})/n from the ideal gas law. Is this solution wrong? As I see it, this cant be solved without knowing the number of moles of gas (or mass of the gas depending on which R is used). I was unable to get the correct answer, and the solution seems wrong to me. 


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