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Determining the enthalpy change for different chemical reactions.
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| Words: 1960
| Submitted: Sun Dec 09 2007
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Topic: Determining the enthalpy change for different chemical reactions. I familiarised myself with the Material Safety Data Sheets of toxic substances. PLANNING (A) Enthalpy (H)1 - The sum of the internal energy of the system plus the product of the pressure of the gas in the system and its volume: Esys is the amount of internal energy, while P and V are respectively pressure and volume of the system. However, to make it simpler, this definition can be shortened. Enthalpy (H) is a measure of heat in the system. To measure the enthalpy we have to first figure out the mass of a substance under a constant pressure and determine the internal energy of the system. The enthalpy change (H)2 is the amount of heat released or absorbed when a chemical reaction occurs at constant pressure. Standard conditions3 are used in order to allow experiments that are taken at different locations to come out with the same...
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