A note about problem working

So far we have more than fifty equations. Working a problem would be a terrible task if we had to search through such a bewildering array of equations in the hope of quickly finding the right one. Thus only the fundamental equations should be used in application to any problem. The conditions set in the problem immediately limit these fundamental equations to simple forms from which it should be clear how to calculate the unknowns in the problem. So far we have only seven fundamental equations  

Of course, it is essential to understand the meaning of these equations and the meaning of such terms as isothermal, adiabatic, and reversible. These terms have definite mathematical consequences to the equations. For problems involving the ideal gas, the equation of state, the mathematical consequences of Joule s law, and the relation between the heat capacities should be known. The equations that solve each problem must be derived from these f ew fundamental equations. Other methods of attack, such as attempting to memorize as many equations as possible, produce only panic, paralysis, and paranoia. 

Note 2 We do not need the value of n to calculate T2. Since we were not given n, we can only calculate the value of W, AU and AH per mole of the gas. 

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