The Application of Hess's Law in Coffee-cup Calorimetry

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Issue:

Science

 

Written by:

Sharon G

 

Date added:

July 26, 2012

 

Level:

University

 

Grade:

B

 

No of pages / words:

11 / 3050

 

Was viewed:

9466 times

 

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Essay content:

However, it can be difficult to derive the exact enthalpy in a reaction when multiple processes occur simultaneously. A method to circumvent this problem is outlined in Hess’s Law which was established in 1840. Hess’s Law states that the steps taken to determine the enthalpy of a reaction do not matter because the end results will be the same...
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This is the principle used for both parts of this experiment. In Part I of the experiment, two different reactions are performed to determine the enthalpy of formation for magnesium oxide. One reaction will involve only Mg, and the other will involve MgO – both will react with 1M HCl. Using the change in heat for both of these reactions, the enthalpies can be determined...
displayed 300 characters

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