1. Consider water (H₂O) at high temperature. [Give some reasoning, not just values.] a. b. C. d. Determine ftrans the number of translational degrees of freedom. Determine frot the number of rotational degrees of freedom. Determine frib the number of vibrational degrees of freedom. Determine Cy the heat capacity of water at constant number and volume.
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- 18. Which of the following is the definition of internal energy of a system? a.it is the sum of the kinetic energy of all of its components b.it is the sum of the rotational, vibrational, and translational energies of all of its components c.lt refers only to the energies of the nuclei of the atoms of the component molecules d.It is the sum of the potential and kinetic energies of the componentsAt temperature T, the internal energy of 1mol rigid diatomic molecules is =......We discussed in class (several times) how the Boltzmann distribution can be used to relate the relative populations of two states differing in energy by AU. Suppose you are given a vial containing a solution of glucose in water (don't ask why this would happen). For the purpose of this question, glucose exists in one of two conformations-"chair" or "boat"-with an energy difference (AU) of 25.11 kJ mol1 between them. 1. What would be the proportion of molecules in the "boat" conformation at 310K? 2. Thinking back to our discussion of the individual sources of energy that go into the potential energy calculation for a molecule (e.g. Upond Uangle, Uelectrostatic. etc), give a plausible explanation of why the "boat" conformation is less stable. H он "Chair" OH "Вoat" но но но- HO. H. HO. HO H. HO. OH
- This problem explores the vibrational and rotational energy levels of the hydrogen halides. Experimental data are given below. Hydrogen halides kf (kg/s²) R (pm) HF 970.0 91.7 HCI 480.0 127.5 HBr 410.0 141.4 HI 320.0 160.9 For one mole of each HF, determine the following quantities. ΔΕ1Ο 8.29 x10-20 J b. The number of vibrational energy levels occupied at 300 K j = 2 levels c. The spacing between the two lowest rotational energy levels 7.73 x10-32 ΔΕ10 J Incorrect d. The number of rotational energy levels occupied at 300 K 5 j = levels IncorrectThe 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 components1-The work done in blowing a soap bubble of radius R is W₁ and that to a radius 3R is W2. the ratio of work done is......... 2-. Water rises up to a height of 4 cm, in a capillary tube immersed vertically in water. What will be the length of water column in the capillary tube, if the tube is immersed in water, at an angle of 60° with the vertical? 3- What is the Parachor of methanol (CH3OH), knowing that molecular weight of methanol = 32 g/mole, y = 22.44 dyne/cm and p = 0.7914 g/cm³?
- Answer the following questions in minimum 5 sentences 3. Describe the difference between real deviations from Beer’s law and those due to instrumental orchemical factors.4. How does an electronic transition resemble a vibrational transition? How do they differ?Calculate 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.at 75 °C and 1 mole assuming all possible energy states are populated.
- So, picture an isolated collection of N molecules at temperature Tand in the energy state En. No energy is exchanged with the surroundings. As some of them get bumped up into other energy states Ei, what happens to the thermal energy of the molecule?Consider a system that has two distinguishable molecules that can occupy three different energy levels (having energies of 1kJ, 2kJ and 3kJ, respectively). What is the probability that the molecules will have a total energy of 2 kJ?As one might predict from a button called "lose energy", this resulted in a decrease in the total energy of the system of two He atoms. Remember that this molecule is part of the surroundings. In the box below, explain how the molecule participates in this decrease in total energy of the system of two He atoms. (Hint: at this atomic-molecular level, what actions are occurring?) Enter your answer here