First Law of Thermodynamics

The first law of thermodynamics, or conservation of energy, states that energy can be neither created nor destroyed, but only converted from one form to another. The motion of the molecules causes thermal or internal energy embodied within a system. Transient forms of energy include heat and work.

The first law of thermodynamics for a system undergoing a cycle is:

For the non-cycle process, the law is:

Where:

Q = The heat transferred to the system during the process

W = The work done by the system during the process E = Total energy of the system (internal, kinetic, and potential) in the given state (this energy may be associated with the motion and position of the molecules, with the structure of the atoms, with chemical reactions, with gravity, or with any of a number of other forms of interaction)

Renewable Energy 101

Renewable Energy 101

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable. The usage of renewable energy sources is very important when considering the sustainability of the existing energy usage of the world. While there is currently an abundance of non-renewable energy sources, such as nuclear fuels, these energy sources are depleting. In addition to being a non-renewable supply, the non-renewable energy sources release emissions into the air, which has an adverse effect on the environment.

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