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This chemistry video tutorial provides a basic introduction into the first law of thermodynamics. It shows the relationship between internal energy, heat, and work. It discusses the difference between the system and surroundings and distinguishes an open system from a closed system and an isolated system. In chemistry, work is positive whenever work is done on the system and work is negative whenever work is done by the system. During an exothermic process, heat flows out of the system and it flows into the system during an endothermic process.

Thermochemistry - Free Formula Sheet:


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First Law of Thermodynamics:


Thermochemistry Equations:


Internal Energy, Heat, and Work:


Thermochemical Equations:


Specific Vs Molar Heat Capacity:


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Basic Calorimetry Problems:


Final Temperature Calorimetry Problems:


Latent Heat of Fusion & Vaporization:


Coffee Cup Calorimeter:


More Calorimeter Problems:


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Specific Heat Capacity Problems:


Hess Law Problems:


More Hess Law Problems:


Enthalpy of Formation & Heat Combustion:


Enthalpy Practice Problems:


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Speed of Light, Frequency, & Wavelength:


Final Exams and Video Playlists:


Full-Length Videos and Worksheets:

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