saplinglearning.com Howdy Sapling Assignments-18 SPR?Sra Em Texas A&M; Universit
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saplinglearning.com Howdy Sapling Assignments-18 SPR?Sra Em Texas A&M; Universit M 111 Lab- Spring18-LEE> Activities and Due Dates Rec. F: Enthalpy ?4/11/2018 11:30 AM 12.5/15 Calculator Periodic Table ? Gradeb Question 7 of 12 A coffee cup calorimeter was used to measure the heat of solution the change in enthalpy that occurs when a solid dissolves in water. A 10.0 g sample of an ionic compound with a molar mass of 120.0 g/mol was added to a sample of deionized water to produce 60.0 grams of solution. After temperature was found to change from 25.00 t to 23.95° solution, ??chtion, per mole of salt dissolved. Assume the specific heat of the solution is 4.08 Jig, ?) and the heat capacity of the calorimeter is 6.20 Jr. and dissolving the solid, the late the enthalpy of Calculate the heat change experienced by the Number Calculate the heat change experienced by the calorimeter, qcal Calculate the heat change produced by the solution process, qhol Number Calculate ?.okton, the enthalpy of solution for one mole of solid in kJ/mol kJ/ mol O Previous Check Answer 0 Next tl Ext Hint terms of use | contact us helpExplanation / Answer
Formula,
Heat change = mass * secific heat * change in temeprature
qcontents = 60.0 * 4.08 * ( 23.95 - 25.00 ) = - 257.04 J
qcalorimeter = Heat capacity of calorimeter * change in temperature = 6.20*(23.95 - 25.00) = - 6.51 J
qsol = - 257.04 - 6.51 = - 263.55 J
Mass of ionic compound = 10.0 g.
Molar mass of ionic compound = 120. g/mol
Moles of ionic compound = mass / molar mass = 10.0 / 120. = 0.0833 mol
deltaHsolution = - q / n = - ( - 263.55 ) / 0.0833 = 3163 J/mol = 3.16 kJ/mol
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