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Thermochemistry basics
The law of Conservation of Energy refers to an isolated system in which there is no net change in energy and where energy is neither created nor destroyed. Although there is no change in energy, energy can change forms, for example from potential to kinetic energy. In other words, potential energy (V) and kinetic energy (T) sum to a constant total energy (E) for a specific isolated system.
E = T + V
Another way that energy can change forms is heat (q) and work (w). As heat is applied to a closed system, the system does work by increasing its volume.
w = P e x t Δ V
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Quantum mechanics' equation
In quantum mechanics, the equation
- H^ψn=Enψn
Where,
- E = the energy corresponding to a wave function
- V = the potential
- H^ = the Hamiltonian operator
The equation is analogous to the equation:
E=T+V
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Equation explained
where Pext is the external pressure, and 🔺V is the change in volume. A classic example of this is a piston. As heat is added to the cylinder, the pressure inside the cylinder increases. The piston then rises to relieve the pressure difference between the pressure inside the cylinder a...
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Equation explained
where Pext is the external pressure, and 🔺V is the change in volume. A classic example of this is a piston. As heat is added to the cylinder, the pressure inside the cylinder increases. The piston then rises to relieve the pressure difference between the pressure inside the cylinder a...
Quantum mechanics' equation
In quantum mechanics, the equation
- H^ψn=Enψn
Where,
- E = the energy corresponding to a wave function
- V = the potential
- H^ = the Hamiltonian operator
The equation is analogous to the equation:
E=T+V
The Law of Conservation Energy
According to the law of conservation of energy, the total energy of a system remains constant through the energy that may change into another form.
Moreover, energy is something that cannot be created not destroyed, it simply is. Energy can change forms and is als...
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