I'm not understanding that much. but if i'm right the answer is <span>3.84 x 10^-19 J</span>
Answer:
true
Explanation:
any object that is larger will take a longer time to do things, the same applies to heat levels. The lower the heat, the longer it takes, the higher the heat, the shorter it takes. So if an iceberg is large, it will need a higher heat, whereas an ice cube is really small and doesn't need that much heat to melt.
Answer:
Here's what I get.
Explanation:
(b) Wavenumber and wavelength
The wavenumber is the distance over which a cycle repeats, that is, it is the number of waves in a unit distance.
![\bar \nu = \dfrac{1}{\lambda}](https://tex.z-dn.net/?f=%5Cbar%20%5Cnu%20%3D%20%5Cdfrac%7B1%7D%7B%5Clambda%7D)
Thus, if λ = 3 µm,
![\bar \nu = \dfrac{1}{3 \times 10^{-6} \text{ m}}= 3.3 \times 10^{5}\text{ m}^{-1} = \textbf{3300 cm}^{-1}](https://tex.z-dn.net/?f=%5Cbar%20%5Cnu%20%3D%20%5Cdfrac%7B1%7D%7B3%20%5Ctimes%2010%5E%7B-6%7D%20%5Ctext%7B%20m%7D%7D%3D%203.3%20%5Ctimes%2010%5E%7B5%7D%5Ctext%7B%20m%7D%5E%7B-1%7D%20%3D%20%5Ctextbf%7B3300%20cm%7D%5E%7B-1%7D)
(a) Wavenumber and frequency
Since
λ = c/f and 1/λ = f/c
the relation between wavenumber and frequency is
![\bar \nu = \mathbf{\dfrac{f}{c}}](https://tex.z-dn.net/?f=%5Cbar%20%5Cnu%20%3D%20%5Cmathbf%7B%5Cdfrac%7Bf%7D%7Bc%7D%7D)
Thus, if f = 90 THz
![\bar \nu = \dfrac{90 \times 10^{12} \text{ s}^{-1}}{3 \times 10^{8} \text{ m$\cdot$ s}^{-1}}= 3 \times 10^{5} \text{ m}^{-1} = \textbf{3000 cm}^{-1}](https://tex.z-dn.net/?f=%5Cbar%20%5Cnu%20%3D%20%5Cdfrac%7B90%20%5Ctimes%2010%5E%7B12%7D%20%5Ctext%7B%20s%7D%5E%7B-1%7D%7D%7B3%20%5Ctimes%2010%5E%7B8%7D%20%5Ctext%7B%20m%24%5Ccdot%24%20s%7D%5E%7B-1%7D%7D%3D%203%20%5Ctimes%2010%5E%7B5%7D%20%5Ctext%7B%20m%7D%5E%7B-1%7D%20%3D%20%5Ctextbf%7B3000%20cm%7D%5E%7B-1%7D)
(c) Units
(i) Frequency
The units are s⁻¹ or Hz.
(ii) Wavelength
The SI base unit is metres, but infrared wavelengths are usually measured in micrometres (roughly 2.5 µm to 20 µm).
(iii) Wavenumber
The SI base unit is m⁻¹, but infrared wavenumbers are usually measured in cm⁻¹ (roughly 4000 cm⁻¹ to 500 cm⁻¹).
Answer:
the frequency of photons ![v = 1.509\times10^{39}Hz](https://tex.z-dn.net/?f=v%20%3D%201.509%5Ctimes10%5E%7B39%7DHz)
Explanation:
Given: first ionization energy of 1000 kJ/mol.
No. of moles of sulfur = 1 mole
![\Delta E_1 = 1000KJ/mol](https://tex.z-dn.net/?f=%5CDelta%20E_1%20%3D%201000KJ%2Fmol)
We know that plank's constant
![h = 6.626\times10^{-34} Js](https://tex.z-dn.net/?f=h%20%3D%206.626%5Ctimes10%5E%7B-34%7D%20Js)
Let the frequency of photons be ν
Also we know that ΔE = hν
this implies ν = ΔE/h
![= \frac{10^6J}{6.626\times10^{-34} Js}](https://tex.z-dn.net/?f=%3D%20%5Cfrac%7B10%5E6J%7D%7B6.626%5Ctimes10%5E%7B-34%7D%20Js%7D)
![v = 1.509\times10^{39}Hz](https://tex.z-dn.net/?f=v%20%3D%201.509%5Ctimes10%5E%7B39%7DHz)
Hence, the frequency of photons ![v = 1.509\times10^{39}Hz](https://tex.z-dn.net/?f=v%20%3D%201.509%5Ctimes10%5E%7B39%7DHz)
Thermal energy is the sum of the kinetic and potential energy of all the particles in an object. The figure shows that if either potential or kinetic energy increases, thermal energy increases.
hope it really helps...!!!