Part ACalculate the specific heat capacity at constant volume of water vapor, assuming the nonlinear triatomic molecule has three translational and three rotational degrees of freedom andthat vibrational motion does not contribute. The molar mass of water is 18.0 g/mol.Express your answer in J/(kg · K).?cy =J/(kg K)SubmitPrevious Answers Request AnswerX Incorrect; Try Again; 5 attempts remainingPart BThe actual specific heat capacity of water vapor at low pressures is about 2000J/(kg · K). Calculate the molar heat capacity for actual water vapor.Express your answer in J/(kg · K).ΑΣφ?Cy =J/(kg - K) Part CCompare this with your calculation and find the actual role of vibrational motion. Calculate the differece between the actual molar heat capacity from part B and the molar heat capacityyou used in part A.Express your answe in terms of gas constant R.?CVB – CVA =R%3DSubmitPrevious Answers Request Answer

Answered: Image /qna-images/answer/94a6fcee-8af4-46a6-ab13-193ce13f2f96.jpg

Calculate the specific heat capacity at constant volume of water vapor, assuming the nonlinear triatomic molecule has three translational and three rotational degrees of freedom and that vibrational motion does not contribute. The molar mass of water is 18.0 g/mol. Express your answer in J/(kg · K).

Calculate the specific heat capacity at constant volume of water vapor, assuming the nonlinear triatomic molecule has three translational and three rotational degrees of freedom and that vibrational motion does not contribute. The molar mass of water is 18.0 g/mol. Express your answer in J/(kg · K).

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter2: The Kinetic Theory Of Gases

Section: Chapter Questions

Problem 12CQ: Experimentally it appears that many polyatomic molecules' vibrational degrees of freedom can...

See similar textbooks

Similar questions

To what temperature must a gas sample initially at 27°C be raised in order for the average energy of it's molecule to triple?
Although an ordinary H2 molecule consists of two identical atoms, this is not the case for the molecule HD, with one atom of deuterium (Le., heavy hydrogen, 2H). Because of its small moment of inertia, the HD molecule has a relatively large value of E: 0.0057 eV. At approximately what temperature would you expect the rotational heat capacity of a gas of HD molecules to "freeze out," that is, to fall significantly below the constant value predicted by the equipartition theorem?
A gas phase H19F molecule has a bond length of 91.68 pm and a vibrational force constant,k = 966 N/m. For the v = 0, J = 10 and v = 1, J = 10 rovibrational levels, calculate the period of rotation andvibration. How many times does the molecule rotate during one vibrational period?
An interstate highway is made of concrete slabs 25 m long placed end to end. (a) Whatexpansion gap must be left between the slabs to prevent buckling when the temperaturechanges from 20 oC to 50 oC? (b) Starting with the gap calculated in part (a), find the gapwhen the temperature decreases to -20 oC.
Estimate the mean free path of a nitrogen molecule in a cylinder nitrogen at 2 atm and a temperature of 17 oC. Take the radius to be roughly equal to 1 x10-10 m. Boltzmann constant 1.38 x10-23 J/K.
What is the physical significance of the Biot number? Is the Biot number more likely to be larger for highly conducting solids or poorly conducting ones?
To give a helium atom nonzero angular momentum requires about 21.2 eV of energy (that is, 21.2 eV is the difference between the energies of the lowest-energy or ground state and the lowest-energy state with angular momentum). The electron-volt or eV is defined as 1.60 × 10−19 J. Find the temperature T where this amount of energy equals kB T/2. Does this explain why we can ignore the rotational energy of helium for most purposes? (The results for other monatomic gases, and for diatomic gases rotating around the axis connecting the two atoms, have comparable orders of magnitude.)
The active element of a certain laser is made of a glass rod 30.0 cm long and 1.50 cm in diameter. Assume the average coefficient of linear expansion of the glass is equal to 9.00 106 (C)1. If the temperature of the rod increases by 65.0C, what is the increase in (a) its length, (b) its diameter, and (c) its volume?
Consider the HCl molecule, which consists of a hydrogen atom of mass 1 u bound to a chlorine atom of mass 35 u. The equilibrium separation between the atoms is 0.128 nm, and it requires 0.15 eV of work to increase or decrease this separation by 0.01 nm. (a) Calculate the four lowest rotational energies (in eV) that are possible, assuming the molecule rotates rigidly. (b) Find the molecules spring constant and its classical frequency of vibration. (Hint: Recall that U=12Kx2.) (c) Find the two lowest vibrational energies and the classical amplitude of oscillation corresponding to each of these energies. (d) Determine the longest wavelength radiation that the molecule can emit in a pure rotational transition and in a pure vibrational transition.
Experimentally it appears that many polyatomic molecules' vibrational degrees of freedom can contribute to some extent to their energy at room temperature. Would you expect that fact to increase or decrease their heat capacity from the value R? Explain.
Using a numerical integration method such as Simpson's rule, find the fraction of molecules in a sample of oxygen gas at a temperature of 250 K that have speeds between 100 m/s and 150 m/s. The molar mass of oxygen (O2) is 32.0 g/mol. A precision to two significant digits is enough.
Using the method of the preceding problem, estimate the fraction of nitric oxide (NO) molecules at a temperature of 250 K that have energies between 3.451021 J and 3.501021 J. `