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Other units sometimes used to describe reaction energetics are kilocalories per mole (kcal·mol −1), electron volts per particle (eV), and wavenumbers in inverse centimeters (cm −1). 1 kJ·mol −1 is approximately equal to 1.04 × 10 −2 eV per particle, 0.239 kcal·mol −1, or 83.6 cm −1.
The kinetic energy of a 2 kg mass travelling at 1 m/s, or a 1 kg mass travelling at 1.41 m/s. The energy required to lift an apple up 1 m, assuming the apple has a mass of 101.97 g. The heat required to raise the temperature of 0.239 g of water from 0 °C to 1 °C. [15] The kinetic energy of a 50 kg human moving very slowly (0.2 m/s or 0.72 km/h).