7.5 g KNO3 dissociated in 49.0 g of water in a coffee cup calorimeter. The thermometer reading changed from 20.4 °C to 9.7°C. What is the heat of the reaction? KNO, → K* + NO, Csoln = 4.18 J/g °C Ccal = 6.5 J/°C %3D %3D qrxa. = [ ? ] J Hint: Make sure to account for all parts of the solution and calorimeter. Enter either a + or - sign AND the magnitude. q.rxn (J)

Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter5: Thermochemistry
Section: Chapter Questions
Problem 5.63QE: A 0.470-g sample of magnesium reacts with 200 g dilute HCl in a coffee-cup calorimeter to form...
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7.5 g KNO3 dissociated in 49.0 g of water in
a coffee cup calorimeter. The thermometer
reading changed from 20.4 °C to
9.7°C. What is the heat of the reaction?
KNO3 → K* + NO,
Csoln = 4.18 J/g °C
Ccal = 6.5 J/°C
9rxn. = [ ? ] J
Hint: Make sure to account for all parts of the
solution and calorimeter.
Enter either a + or - sign AND the magnitude.
q,rxn (J)
Enter
Transcribed Image Text:cellus_engine.html?ClassID=1752193328# 7.5 g KNO3 dissociated in 49.0 g of water in a coffee cup calorimeter. The thermometer reading changed from 20.4 °C to 9.7°C. What is the heat of the reaction? KNO3 → K* + NO, Csoln = 4.18 J/g °C Ccal = 6.5 J/°C 9rxn. = [ ? ] J Hint: Make sure to account for all parts of the solution and calorimeter. Enter either a + or - sign AND the magnitude. q,rxn (J) Enter
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