Interpretation:
The ratio of the partition functions at the same volume and temperature for a
Concept introduction:
Statistical
It is used to calculate the state functions like energy, pressure, wavelength etc. of the thermodynamic system. The expressions obtained for state functions using partition functions help to determine the statistical aspect of thermodynamic system.
Want to see the full answer?
Check out a sample textbook solutionChapter 17 Solutions
Physical Chemistry
- 4) Consider a chemical reaction R⇒ P at 300 K. R has two states separated by 2.0x10-22 J. P has a doubly degenerate level that is 1.0x10-22 J above the ground state of P. a) Which one has a larger molecular partition function? b) Find the equilibrium constant for the reaction.arrow_forwardDerive an expression showing how entropy can be related to thermodynamic probability.arrow_forwardPlease don´t use partition equationarrow_forward
- JustifyTrouton"s rule. What are the sources of discrepancies?arrow_forwardGive the equation for the Helmholtz energy, A. (Use the following as necessary: S, T, and U.) A = U-TS - TS Give the equation for entropy that contains the canonical partition function, Q. (Use the following as necessary: E, kB, Q, and T.) E E S = k ln(Q) + B kB ln (Q) + Step 2 of 7 We only need to consider the translational translational partition function for an ideal monatomic gas, so E = U - Uo. Combine this equation with the equations for S and A from Step 1. (Use the following as necessary: KB, Q, T, U, and Up.) A = |— Tkôln(Q) + U U₁ - KBT ln(Q) Step 3 of 7 Substitute the equation from Step 2 into the given equation for P and complete the partial derivative. (Use the following as necessary: kB, Q, T, U, and Up.) -(SA), P = - a In(Q)). KBT = KBT Step 4 of 7 For an ideal monatomic gas, the following is true. (Use the following as necessary: T, U, and V.) (U) = UT - 0 Step 5 of 7 Give the equation for the canonical partition function Q. Remember that only the translational…arrow_forwardImagine you have four difference systems, each with only two possible states. The temperature and relative spacing of the two states in each system are shown in the diagram. T: 900 K 300 K 300 K 900 K 2 states 2 states 2 states 2 states 2E 2E 2E E E system 1 system 2 system 3 system 4 What is the correct order of the values for the partition functions for each of these systems? The value of the partition function for system x is denoted as 4x. C4i < q2 < q3 < q4 41 < 93 < q2 < q4 C 92 < q1 < q4 < q3 C 42 < 44 < 91 < qs C 94 < 92 < q3 < 91 C 94 < 91 < q1 < q2 C 94 < 43 < q2 < qi energyarrow_forward
- The internal energy of a system A None of these В is the sum of the rotational, vibrational, and translational energies of all of its components refers only to the energies of the nuclei of the atoms of the component molecules D is the sum of the kinetic energy of all of its components E) is the sum of the potential and kinetic energies of the componentsarrow_forwardAt what temperature is the standard molar entropy of helium equal to that of xenon at 298 K?arrow_forward1. Write down the equation used to account for the variation of molar heat capacity of a material at constant pressure with temperature assuming that the temperature range is significant.arrow_forward
- The translational canonical partition function Qtrs of an ideal monoatomic gas is given by: 3N 2T alnQtrs ƏT √² = Justify mathematically why the translational contribution to the molar constant-volume heat capacity is: Cy = 3Nk 3 - Nk Derive an expression for pressure in terms of the canonical partition function Q, and then obtain an expression for the Gibbs energy in terms of the canonical partition function Q. Consider the mixing of two perfectly miscible (ideal) organic solvents A and B. Calculate their respective mole fractions needed to obtain the greatest entropy of mixing.arrow_forwardCalculate the vibrational, rotational, and translational contributions to the constant volume heat capacity (Cv) for 14N2 at 298 K. Assume this represents the high temperature limit for rotational energy and low temperature limit for vibrational energy. Given that Cv=20.81 J/K·mol for N2, state which type or types of energy contribute most to Cv for N2 and explain why those types of energy contribute most.arrow_forwardDescribe enthropy. What the entropy describes about a system, the statistical (boltzmann) definition of the entropy, and two example systems illustrating the Boltzmann definition of entropy.arrow_forward
- Physical ChemistryChemistryISBN:9781133958437Author:Ball, David W. (david Warren), BAER, TomasPublisher:Wadsworth Cengage Learning,