Results of the experiment have to be discussed and interpreted in terms of thermochemistry and stoichiometry of the reaction. Whether the given reaction is exothermic or endothermic has to be given and reason that why more energy transferred in some cases has to be explained. For each given experiment the limiting reagent has to be identified.

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Using the conditions of spontaneity to deduce the signs of AH and AS Use the observations about each chemical reaction in the table below to decide the sign (positive or negative) of the reaction enthalpy AH and reaction entropy AS. Note: if you have not been given enough information to decide a sign, select the "unknown" option. reaction observations conclusions A This reaction is always spontaneous, but proceeds slower at temperatures above 120. °C. ΔΗ is (pick one) AS is (pick one) ΔΗ is (pick one) B This reaction is spontaneous except above 117. °C. AS is (pick one) ΔΗ is (pick one) This reaction is slower below 20. °C than C above. AS is |(pick one) ? 18 Ar 1

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Chapter 4, Problem 121QRT

Interpretation Introduction

Interpretation:

Results of the experiment have to be discussed and interpreted in terms of thermochemistry and stoichiometry of the reaction. Whether the given reaction is exothermic or endothermic has to be given and reason that why more energy transferred in some cases has to be explained. For each given experiment the limiting reagent has to be identified.

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