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Topic: Enthalpy change of neutralisation. 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. 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. The standard enthalpy change of neutralization3 is the change in enthalpy that occurs when an acid and base undergo a neutralization reaction to form one mole of water under standard conditions (298k and 1atm), i.e. react to produce water and a salt. It is...

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