What is the longest wavelength of light that will provide photons of sufficient energy to break the pi bond and cause the isomerization?
Energy required to break pi bond is 4.42*10^-19.
wavelenght=c/f but how do i figure out what f is?
duplicate post.
To find the frequency (f) of light, we can use the equation c = λf, where c is the speed of light (approximately 3 x 10^8 m/s) and λ is the wavelength of light.
In this case, we need to find the longest wavelength (λ) of light that will provide photons with sufficient energy to break the pi bond (4.42 x 10^-19 J).
First, convert the energy required to joules. The energy in joules (E) is given by E = hf, where h is Planck's constant (approximately 6.63 x 10^-34 J·s) and f is the frequency of light.
Rearranging the equation, we can express the frequency as f = E/h.
Now, substitute the given energy value into the equation and calculate the frequency: f = (4.42 x 10^-19 J) / (6.63 x 10^-34 J·s).
The resulting value of f will be in units of Hz (1/s).
Finally, substitute the calculated value of the frequency into the equation c = λf and solve for λ. Rearrange the equation to solve for λ: λ = c/f.
By substituting the speed of light (c) and the calculated frequency (f) into the equation, you can find the longest wavelength of light that will provide photons with sufficient energy to break the pi bond and cause isomerization.