Salma Ahmed
English Lit. GCSE Student
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Application of HessâÂÂ(TM)s law to Determine the Enthalpy Change of Hydration of Magnesium Sulphate(VI)
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Have a little read: ... Experiment 6 Date: 18-10-2005 Application of Hess's law to Determine the Enthalpy Change of Hydration of Magnesium Sulphate(VI) Objective To determine enthalpy change of hydration of magnesium sulphate (VI) . Introduction The enthalpy of a substance refers to its total energy content. During reactions, the enthalpy of the substances involved changes. This is known as the enthalpy change of a substance. Enthalpy change of substances from their initial states to their final states is independent of the pathways. This means that no matter how many reactions the reactants undergo to form the same products, the change in enthalpy is always the same. This principle governing the change of enthalpy of substances is known as the Hess's Law. For example, a certain amount of magnesium sulphate (VI) powder is dissolved in distilled water, and the enthalpy change, H1 is recorded. Magnesium sulphate (VI)-7-water is also dissolved in water and its enthalpy change, H2 is also recorded.
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