Which of the following statements is false?
A. While volume is an extensive property, molar volume is an intensive property.
B. A closed system is one that allows for no energy transfer across a system boundary.
C. All monatomic ideal gases have the same heat capacity in J/mol•K, but they have different values of CP* in kJ/kg•K.
D. If the initial and final states of a system are identical, then ?U for the entire process is zero, regardless of what changes occurred during the process.
E. The units L•bar, m3•Pa, J, Pa•L and N•m are all dimensionally equivalent and interconvertable.
A. Incorrect. This statement is true. Section 2.2.4 defines intensive and extensive properties.
B. Correct. A closed system is one that has no matter crossing the system boundaries; energy can be transferred in or out.
C. Incorrect. This statement is true. Any monatomic ideal gas has CV* = (3/2)R and CP* = (5/2)R, but they have different molecular weights, so if you convert (5/2)R from a molar to a mass basis, CP* will have different numerical values.
D. Incorrect. This statement is true.U is a state property, so if the initial and final states of the system are identical, the values of U at these points are equal.
E. Incorrect. This statement is true. Energy and pressure-volume have the same base dimensions of mass•length2/time2. Examine the table of different values for the gas constant to convince yourself.
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