Question

10- Hess Lab Section: eriment Nine - Endo-and Exo-Thermic Reactions: Hess's Law troduction experiment, you will use a Styrofoam-cup calorimeter to measure the heat released by three rea the reactions is the same as the combination of the other two reactions. Therefore, according law, the heat of reaction of the one reaction should be equal to the sum of the heats of reaction wo. This concept is sometimes referred to as the additivity of heats of reaction. The primary ob experiment is to confirm this law. The reactions we will use in this experiment are: d sodium hydroxide dissolves in water to form an aqueous solution of ions. NaOH(s) Na (aq) +OH (a) AH1- d sodium hydroxide reacts with aqueous hydrochloric acid to form water and an aqueous sol chloride. NaOHs)+H'(a?)+ CI (aq) H,00)+ Na (aq)+CI (aq) AH-? tions of aqueous sodium hydroxide and hydrochloric acid react to form water and aqueous Na+(aq) + ??-(aq) + HOaq) + craq)-H20(I) + Na"(aq) + CI-(aq) H 3-7 use a Styrofoam cup in a beaker as a calorimeter, as shown in Figure rposes of this experiment, you may assume that the heat loss to the er and the surrounding air is negligible. Even if heat is lost to either t is a fairly constant factor in each part of the experiment and has t on the final results ALS: Figure 1

Answer 1

The answer to first question

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