## How do you go from kJ mol to J photon?

The conversion to kJ/mol involves using Avogadro’s number and converting J to kJ: E (kJ/mol) = (3.713 × 10−19 J/photon)(6.022 × 1023 photon/mol)(10−3kJ/J) = 224 kJ/mol.

**How do you calculate the energy of a photon with wavelength?**

The relationship between the energy of a photon (E) and the wavelength of the light (λ) is an inverse relationship and is described by the following by the equation: E=hcλE=hcλ where h is Planck’s constant and c is the speed of light.

**How do you convert energy to J photon?**

Divide the result by the electromagnetic wavelength, in meters, of the photon. Multiply the result by the number of photons that you want to measure. The result will be the joules of energy contained in the photons.

### How do you find energy from wavelength in kJ mol?

Solution:

- Convert kJ to J: 3.82 x 10-22 kJ times (1000 J / 1 kJ) = 3.82 x 10-19 J.
- What you now do is combine these two equations: E = hν and λν = c.
- Calculate the wavelength in meters: (3.82 x 10-19 J) (λ) = (6.626 x 10-34 J s) (3.00 x 108 m/s)

**What is the energy in J of a photon with wavelength?**

Ernest Z. The energy of the photon is 3.97 × 10⁻²¹ J. You have two useful formulas. E=hf , where h is Planck’s constant, and f is the frequency of the photon.

**What is the energy in J mol?**

It is also a SI derived unit of molar thermodynamic energy defined as the energy equal to one joule in one mole of substance. Since 1 mole = 6.02214076×1023 particles (atoms, molecules, ions etc.), 1 joule per mole is equal to 1 joule divided by 6.02214076×1023 particles, 1.66054×10−24 joule per particle.

## How do you convert J to nanometers?

To calculate Joules from nanometers, multiply the speed of light by the plank constant and then divide by the wavelength in meters.

**How do you convert kJ mol to mol?**

kJ is the units “Joules” multiplied by a number (kilo = x1000) that has no units of it’s own. kJ/mol is just the J multiplied by a number that has no units on it’s own: 1000/mol.

**How do you convert kJ/mol to J in photoelectric effect?**

Question: How would one convert a work function given in kJ/mol to J in order to solve for a photoelectric effect problem? Answer: Cancel out the 1/mol unit by dividing by the Avogadro constant. Then convert kJ to J by multiplying the kJ value by 1000 (because of the conversion factor 1 kJ = 1000 J).

### How do you calculate photon energy from wavelength?

Calculation Theory Photon Energy and Wavelength The energy of light (or photon energy), E, is inversely proportional to the wavelength by the equation: E = hc/ l (equation 1)

**How do you convert kJ to J in chemistry?**

Re: How to convert kJ/mol to J. Answer: Cancel out the 1/mol unit by dividing by the Avogadro constant. Then convert kJ to J by multiplying the kJ value by 1000 (because of the conversion factor 1 kJ = 1000 J).

**What is the unit of energy in kJ?**

A Joule, J, is the SI unit of energy and is defined as one kg.m2/s2. The prefix “kilo” means 1,000, so one kJ = 1,000 J. As the energies associated with a single molecule or atom are quite small, we often find it easier to discuss the energy found in one mole of the substance, hence “per mole”.