**Contents**show

## How do you convert joules to joules mol?

**Divide the number of joules released in the reaction by the known joules per mole constant** for that type of reaction. For example, if a reaction between sodium hydroxide and water releases 30,000 joules of energy, divide 30,000 by 55,200 to get . 54 moles.

## How do you convert joules to kJ per mole?

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”. To get the energy for one molecule, divide kJ/mol by Avogadro’s number, **6.022 x 1023**.

## How do you calculate kJ per mole?

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”. To get the energy for one molecule, **divide kJ/mol by Avogadro’s number, 6.022 x 1023**.

## How do you convert from moles to energy?

**Multiply the photon energy value by Avogadro’s number** to find the energy of one mole of photons. Avogadro’s number is the quantity of the number of molecules or particles in one mole of a particular substance and is equal to 6.02 x 10^{23}.

## How many joules are in a mole?

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 = 6.02214076×10^{23} particles (atoms, molecules, ions etc.), 1 joule per mole is equal to 1 joule divided by 6.02214076×10^{23} particles, 1.66054×10^{−}^{24} joule per particle.

## How many joules are in a gram?

Joule to Gram-force Meter Conversion Table

Joule [J] | Gram-force Meter [gf*m] |
---|---|

0.01 J | 1.019716213 gf*m |

0.1 J | 10.1971621301 gf*m |

1 J |
101.9716213009 gf*m |

2 J | 203.9432426019 gf*m |

## Is kJ and kJ mol the same?

Usually it seems that **delta H for an entire reaction is in kJ**, since there are varying numbers of moles depending on which product or reactant it is. If the question asks for kJ per mole of product, then you would have to divide the enthalpy by the specific number of moles and give the answer in kJ/mole.

## What is the formula for moles to grams?

Moles to grams example problem

Solution: Find out the molar mass of the substance (hint: you can use Molar mass of the substance alone to calculate molar mass). The molar mass of KClO3 is 122.548 g/mol. **Multiply the given number of moles** (2.50 mol) by the molar mass (122.548 g/mol) to get the grams.

## How many joules are in a Kilojoule?

Joules to kilojoules conversion table

Energy (J) | Energy (kJ) |
---|---|

800 J | 0.8 kJ |

900 J | 0.9 kJ |

1000 J |
1 kJ |

2000 J | 2 kJ |

## What is the mole equation?

Worked Example: **moles = mass ÷ molar mass (n=m/M)**

## What is the formula for calculating energy change?

**To calculate an energy change for a reaction:**

- add together the bond energies for all the bonds in the reactants – this is the ‘energy in’
- add together the bond energies for all the bonds in the products – this is the ‘energy out’
- energy change = energy in – energy out.

## How do I calculate moles?

**How to find moles?**

- Measure the weight of your substance.
- Use a periodic table to find its atomic or molecular mass.
- Divide the weight by the atomic or molecular mass.
- Check your results with Omni Calculator.