116 of 401 when 5, 12 g of NaOH were dissolved in 51.55 g water in a calorimeter
ID: 573930 • Letter: 1
Question
116 of 401 when 5, 12 g of NaOH were dissolved in 51.55 g water in a calorimeter at 24.5, the temperature of the solution went up to 49.8°C. 2, Is this solution reaction exothermic? Why? a. b. Calculate u using Eqton joules c. Find // for the reaction as it occurred in the calorimeter (Eq. 5). oules (continued on following page) Copyrighs 2011 Cengage Leaming All Rights Rocrved May not be copied, scanned, or duplicated in whole oe in part. Duc to cloctronic righs,ome thied party contont may be suppeessed from the eBook and or eChapsen tonial eview has deemed that any seppressed content does not materially affect the evrall leaming espericnce Congage Learning neserves the right to remove addtional content at any time i subequst rights retrictions require it 104 Experiment 14 Heat Effects and Calorimetry d. Find All for the solution of 1.00 g NaOH in water. joules/gExplanation / Answer
Calorimetric experiment
NaOH dissolved in water
Exothermic reaction
f. Reaction of dissolution,
NaOH(s) + H2O(l) ---> Na+(aq) + OH-(aq) + H2O(l)
g. dH from heat of formation,
Given the heat of formations for NaOH(s), Na+(aq) and OH-(aq) species
using the relation,
dH = dH(products) - dH(reactants)
= (-240 - 230) - (-425)
= -45 kJ
This values is then compared to the value we obtained in part e.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.