Convert moles to joules by multiplying the amount in mol by a molar energy in J/mol, kJ/mol or kcal/mol, with common reaction presets, or work back to moles.
Moles To Joules Formula
The following formula is used to calculate the energy in joules from the amount of substance in moles.
Variables:
- E is the energy in joules (J)
- n is the amount of substance in moles (mol)
- H is the molar enthalpy or molar energy of the substance (J/mol)
To calculate the energy in joules, multiply the amount of substance in moles by the molar enthalpy or molar energy of the substance.
| Moles (mol) | Energy (J) | Energy (kJ) | Energy (kcal) |
|---|---|---|---|
| 0.01 | 571 | 0.571 | 0.136 |
| 0.05 | 2855 | 2.855 | 0.682 |
| 0.10 | 5710 | 5.710 | 1.365 |
| 0.25 | 14275 | 14.275 | 3.412 |
| 0.33 | 18843 | 18.843 | 4.504 |
| 0.50 | 28550 | 28.550 | 6.824 |
| 0.75 | 42825 | 42.825 | 10.235 |
| 1.00 | 57100 | 57.100 | 13.647 |
| 1.25 | 71375 | 71.375 | 17.059 |
| 1.50 | 85650 | 85.650 | 20.471 |
| 1.75 | 99925 | 99.925 | 23.883 |
| 2.00 | 114200 | 114.200 | 27.294 |
| 2.50 | 142750 | 142.750 | 34.118 |
| 3.00 | 171300 | 171.300 | 40.942 |
| 4.00 | 228400 | 228.400 | 54.589 |
| 5.00 | 285500 | 285.500 | 68.236 |
| 7.50 | 428250 | 428.250 | 102.354 |
| 10.00 | 571000 | 571.000 | 136.472 |
| 12.50 | 713750 | 713.750 | 170.590 |
| 20.00 | 1142000 | 1142.000 | 272.945 |
| Energy E = n ร ฮH. Assumes ฮH = 57.1 kJ/mol (โ57100 J/mol โ13.647 kcal/mol). 1 kJ = 1000 J; 1 kcal = 4184 J (1 kJ โ 0.239006 kcal). Sign convention omitted; exothermic processes yield negative ฮH. | |||
What is Moles To Joules?
Moles to joules is a conversion process used in chemistry and physics to calculate an energy change in joules from an amount of substance in moles using a specified molar energy. This is typically done in the context of chemical reactions, where the energy change of the reaction can be calculated based on the number of moles of a substance involved in the reaction. The conversion factor used is usually the substance’s molar enthalpy or molar energy, which is the amount of energy per mole of the substance.
How to Calculate Moles To Joules?
The following steps outline how to calculate the Moles To Joules using the formula E = n * H.
- First, determine the amount of substance in moles (n).
- Next, determine the molar enthalpy or molar energy of the substance (H).
- Next, gather the formula from above = E = n * H.
- Finally, calculate the energy in joules (E).
- After inserting the variables and calculating the result, check your answer with the calculator above.
Example Problem :
Use the following variables as an example problem to test your knowledge.
amount of substance in moles (n) = 2
molar enthalpy or molar energy of the substance (H) = 5
