A coffee-cup calorimeter is used to determine the heat of reaction for the acid-base neutralization. HCl + NaOH --> NaCl + H2O When we add 25.00 mL of 0.500 M NaOH at 23.000o C to 25.00 mL of 0.500 M HCl already in the calorimeter at the same temperature, the resulting temperature is observed to be 26.95o C. Using the value you determined for heat capacity of the calorimeter and assume that the specific heat of the mixture is the same as that of water, 4.18 J/goC and that the density of the mixture is 1.02 g/mL; determine the heat of reaction for the reaction. How many moles of water would be produced by the neutralization reaction? What’s the ∆H for the reaction? Include the sign.
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.
A coffee-cup calorimeter is used to determine the heat of reaction for the acid-base neutralization.
HCl + NaOH --> NaCl + H2O
When we add 25.00 mL of 0.500 M NaOH at 23.000o
C to 25.00 mL of 0.500 M HCl already in the calorimeter at the same temperature, the resulting temperature is observed to be 26.95o C.
Using the value you determined for heat capacity of the calorimeter and assume that the specific heat of the mixture is the same as that of water, 4.18 J/goC and that the density of the mixture is 1.02 g/mL; determine the heat of reaction for the reaction.
How many moles of water would be produced by the neutralization reaction?
What’s the ∆H for the reaction? Include the sign.
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