For the made up equation ?U=RT(a+T/T_C ), find the constant-volume heat capacity.
a.Ra+ R/T_C
b.Ra+2RT/T_C
c.R(a+R/T_C )
d.R(a+T/T_C )
e.None of these are CV for that definition of molar internal energy.
A. Incorrect. Your calculus is incorrect.
B. Correct. You can additionally factor R back out if desired.
C. Incorrect. This results in an R2 term which does not have the correct units.
D. Incorrect. Your calculus is incorrect.
E. Incorrect. One of these is the correct application of the definition of CV, Equation 2.18.
You might also like to view...
____ is the impact load required to break a test piece of weld metal.
A. Elongation B. Charpy V notch C. Minimum tensile strength D. Yield point
Compounds G and H form non-ideal liquid solutions that can be described by the two-parameter Margules equation. The following is known:
• The vapor pressure of pure compound G at T=300 K is 1 bar. • The vapor pressure of pure compound H at T=300 K is 0.6 bar. • At T=300 K and P=0.8 bar, there is an azeotrope at which liquid and vapor are in equilibrium and both phases have a composition of 70% G and 30% H. A) Find the activity coefficients of compounds G and H in the azeotropic mixture described above. B) Find a general expression for the excess Gibbs energy of a liquid mixture of G and H at T=300 K. The only unknowns in your expression should be the mole fractions of G and H in the liquid phase.
Compression, bending, torsion, and shear are examples of the types of ____ used on welds.
A. welding processes B. weld strength designations C. destructive tests D. strengthening of joints E. none of the above
Technician A says that all tires of the same nominal diameter have the same rolling radius. Technician B says that to determine the rolling radius of a truck tire, measure the periphery using a tape measure and divide the result into one mile. Who is correct?
A. Technician A only B. Technician B only C. Both A and B D. Neither A nor B