Question

Consider a molecule having three energy levels as follows: State Energy (cm−1) degeneracy 1 0 1...

Consider a molecule having three energy levels as follows:

State Energy (cm−1) degeneracy
1 0 1
2 500. 3
3 1500. 5

part a) What is the value of the partition function when T = 360 K ?

part B)What is the value of the partition function when T = 3600K ?

Homework Answers

Answer #1

Solution.

As the system has 3 energy levels, the partition function for this molecule is a sum for the energy levels:

where the thermodynamic beta is given as

The energies should be converted from reciprocal centimeters to a Joules using a formula

part a)

part b)

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
1. Consider a three level system in which the energies are equally spaced (by energy ε);...
1. Consider a three level system in which the energies are equally spaced (by energy ε); each of the levels has certain (nonzero) degeneracy g . A. Write down the general expression for the average energy and the partition function of the system. B. Compute the occupations for ε = kT, when (i) all the states are singly degenerate and (ii) when the degeneracies are g0 = 1, g1 = 1, g2 = 3. Here gj represents the degeneracy of...
1. A molecule has a ground state and two excited electronic energy levels all of which...
1. A molecule has a ground state and two excited electronic energy levels all of which are not degenerate. The energies of the three states are E = 0, E1 = 1x10^-20 J and E2 = 2x10^-20 J. Calculate the partition functions at 298 and 1000K. What fraction of the molecules is in each of the three states at these temperatures?
Consider a system of distinguishable particles with five states with energies 0, ε, ε, ε, and...
Consider a system of distinguishable particles with five states with energies 0, ε, ε, ε, and 2ε (degeneracy of the states has to be determined from the given energy levels). Consider ε = 1 eV (see table for personalized parameters) and particles are in equilibrium at temperature T such that kT =0.5 eV: (i) Find the degeneracy of the energy levels and partition function of the system. (iii) What is the energy (in eV) of N = 100 (see table)...
The first excited vibrational energy level of ditomic chlorine (Cl2) is 558 cm−1 above the ground...
The first excited vibrational energy level of ditomic chlorine (Cl2) is 558 cm−1 above the ground state. Wavenumbers, the units in which vibrational frequencies are usually recorded, are effectively units of energy, with 1cm−1=1.986445×10−23J. If every vibrational energy level is equally spaced, and has a degeneracy of 1, sum over the lowest 4 vibrational levels to obtain a vibrational partition function for chlorine. A) Determine the average molar vibrational energy <Em.vib> for chlorine at 298 K. B) Determine the population...
A system contains two energy levels separated by 300 cm–1 . (a) What are the relative...
A system contains two energy levels separated by 300 cm–1 . (a) What are the relative populations of the upper and lower levels if the temperature is 1 K? What if the temperature is 1×105 K? (b) What is the temperature of the system when the population of the upper energy state is half that of the lower energy state?
1.Consider the rotation of a hydrogen bromide-79 molecule. What is the moment of inertia in kg...
1.Consider the rotation of a hydrogen bromide-79 molecule. What is the moment of inertia in kg m2 of hydrogen bromide-79? Isotope masses to three decimal places are taken from NIST and bond lengths from wikipedia. Use the isotope mass, not the average mass. 2.Next, model the rotation of hydrogen bromide-79 as a "particle on a ring". Calculate the rotational energy difference, in cm-1, between the ml=3 and ml=4 energy levels in a hydrogen bromide-79 molecule. 3.Now model the hydrogen bromide-79...
Consider the first three energy levels of hydrogen (n = 1, 2, 3). a) What photon...
Consider the first three energy levels of hydrogen (n = 1, 2, 3). a) What photon energies can be observed from transitions between these levels? Label these in increasing order as E1, E2, and E3. b) A hydrogen atom which is initially in the n = 2 level collides with an aluminum atom in its ground state (the kinetic energy of the collision is nearly zero). The hydrogen can drop to the n = 1 level and ionize the aluminum...
Consider an electron bound in a three dimensional simple harmonic oscillator potential in the n=1 state....
Consider an electron bound in a three dimensional simple harmonic oscillator potential in the n=1 state. Recall that the e- has spin 1/2 and that the n=1 level of the oscillator has l =1. Thus, there are six states {|n=1, l=1, ml, ms} with ml= +1, 0, -1 and ms = +/- 1/2. - Using these states as a basis find the six states with definite j and mj where J = L +s - What are the energy levels...
1. A gas does 800 J of work to expand and push a piston. If the...
1. A gas does 800 J of work to expand and push a piston. If the total energy of the gas does not change, what is the heat for this process? Take the bold work to be the system. 2. Sodium dimer (Na2) has a vibrational constant of 159.13 cm-1. Calculate the vibrational partition function of Na2 to three significant figures at 300 K. The degeneracy is 1. 3. Calculate the work done (in J) when the volume of an...
A. Consider a hydrogen atom with one electron and quantized energy levels. The lowest energy level...
A. Consider a hydrogen atom with one electron and quantized energy levels. The lowest energy level (n = 1) is the ground state, with energy -13.6 eV. There are four states corresponding to the next lowest energy (n = 2), each with energy-3.4 eV. For the questions below, consider one of these four states, called one of the first excited states. 2. Assume that this hydrogen atom is present in a gas at room temperature (T ~ 300 K, kBT...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT