A 10.7 ml sample of 0.947 M NaOH is mixed with 15.9 ml of 0.955 M HCl in a coffee-cup calorimeter. The enthalpy of the reaction, written with the lowest whole-number coefficients, is -55.8 k). Both solutions are at 23.0°C prior to mixing and reacting. What is the final temperature of the reaction mixture? When solving this problem, assume that no heat is lost from the calorimeter to the surroundings, the density of all solutions is 1.00 g/mL, the specific heat of all solutions is the same as that of water, and volumes are additive. The specific heat of water is 4.18 3/(g- "C). Temperature -
A 10.7 ml sample of 0.947 M NaOH is mixed with 15.9 ml of 0.955 M HCl in a coffee-cup calorimeter. The enthalpy of the reaction, written with the lowest whole-number coefficients, is -55.8 k). Both solutions are at 23.0°C prior to mixing and reacting. What is the final temperature of the reaction mixture? When solving this problem, assume that no heat is lost from the calorimeter to the surroundings, the density of all solutions is 1.00 g/mL, the specific heat of all solutions is the same as that of water, and volumes are additive. The specific heat of water is 4.18 3/(g- "C). Temperature -
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Chapter6: Thermochemisty
Section: Chapter Questions
Problem 6.109QP: A 21.3-mL sample of 0.977 M NaOH is mixed with 29.5 mL of 0.918 M HCl in a coffee-cup calorimeter...
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Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
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Transcribed Image Text:A 10.7 ml sample of 0.947 M NaOH is mixed with 15.9 mL of 0.955 M HOCI in a coffee-cup calorimeter. The enthalpy of the reaction, written with the lowest whole-number coefficients, is -55.8 kJ. Both solutions are at 23.0°C
prior to mixing and reacting. What is the final temperature of the reaction mixture? When solving this problem, assume that no heat is lost from the calorimeter to the surroundings, the density of all solutions is 1.00 g/mL, the
specific heat of all solutions is the same as that of water, and volumes are additive. The specific heat of water is 4.18 J/(g °C).
Temperature =
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