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19 Nov 2019
RE-LAB QUESTIONS 1. In determining the Heat of Formation of MgO, you will be using Hess'Law. Given the following three reactions that you will be using in performing the lab: Eqn.3 a. Using Hess' Law, rearrange the equations as necessary so that the summation of the reactions is Eqn4 Understanding the "Review of Hess Law on page 3 will help you with this. HINT: You will simply rearrange the equations. DO NOT try to calculate the heat of reaction in this prelab, that part will be done when you generate your data during the lab experiment) Eqn.4) b. In lab you will be determining the values of AH for the Mg and MgO reactions (Eq.1, Eqn.2). IF one of those values of ÎH is negative and that reaction is reversed when applying Hess' Law, what sign will the value of ÎH have for that reaction? c. What is the meaning of a negative enthalpy value?
RE-LAB QUESTIONS 1. In determining the Heat of Formation of MgO, you will be using Hess'Law. Given the following three reactions that you will be using in performing the lab: Eqn.3 a. Using Hess' Law, rearrange the equations as necessary so that the summation of the reactions is Eqn4 Understanding the "Review of Hess Law on page 3 will help you with this. HINT: You will simply rearrange the equations. DO NOT try to calculate the heat of reaction in this prelab, that part will be done when you generate your data during the lab experiment) Eqn.4) b. In lab you will be determining the values of AH for the Mg and MgO reactions (Eq.1, Eqn.2). IF one of those values of ÎH is negative and that reaction is reversed when applying Hess' Law, what sign will the value of ÎH have for that reaction? c. What is the meaning of a negative enthalpy value?
Keith LeannonLv2
28 Mar 2019