Understanding the conversion between electronvolts (eV) and joules (J) is crucial in various scientific fields. Here's a simplified formula for the conversion:
1 electronvolt (eV) = 1.602176634 × 10^-19 joules (J)
Using this formula, you can easily convert between the two units:
Here are some practical examples of eV to J conversions:
eV Value | Joule Value |
---|---|
1 eV | 1.602176634 × 10^-19 J |
1 keV (1000 eV) | 1.602176634 × 10^-16 J |
1 MeV (1 million eV) | 1.602176634 × 10^-13 J |
1 GeV (1 billion eV) | 1.602176634 × 10^-10 J |
The conversion between eV and J has numerous applications in science and technology, including:
For quick reference, here's a table summarizing the conversion factors between eV and J:
Unit | Conversion Factor |
---|---|
1 eV | 1.602176634 × 10^-19 J |
1 keV | 1.602176634 × 10^-16 J |
1 MeV | 1.602176634 × 10^-13 J |
1 GeV | 1.602176634 × 10^-10 J |
To provide context, here's a table of typical energy values in eV and J:
Energy Source | Energy Value (eV) | Energy Value (J) |
---|---|---|
Ionization energy of hydrogen | 13.6 | 2.18 × 10^-18 |
Energy of visible light | 1-3 | 1.60 × 10^-19 - 4.81 × 10^-19 |
Energy of X-rays | 1000-100,000 | 1.60 × 10^-16 - 1.60 × 10^-14 |
Energy of nuclear fission | 200 MeV | 3.20 × 10^-11 |
"Energenomics" is a proposed term that combines "energy" and "genomics." It describes the emerging field that explores the relationship between energy levels and biological processes. By understanding the energy requirements for cellular functions, we can potentially develop new therapies and technologies.
Table of Binding Energies
Atom/Molecule | Binding Energy (eV) |
---|---|
Hydrogen atom | 13.6 |
Oxygen atom | 13.6 |
Carbon dioxide molecule | 12.0 |
Water molecule | 9.6 |
Table of Ionization Energies
Element | Ionization Energy (eV) |
---|---|
Hydrogen | 13.6 |
Helium | 24.5 |
Lithium | 5.39 |
Sodium | 5.14 |
Potassium | 4.34 |
Table of Activation Energies
Reaction | Activation Energy (eV) |
---|---|
Hydrogen-oxygen reaction | 2.0 |
Methane combustion | 4.0 |
Ethanol fermentation | 0.6 |
Photosynthesis | 1.2 |
Table of Energy Efficiency
Device | Energy Efficiency (J/eV) |
---|---|
Solar cell | 0.3 |
LED | 0.1 |
Electric motor | 0.8 |
Refrigerator | 0.5 |
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