. What is the essence of determining the heat capacity of the calorimeter? Is it possible to replace the calorimeter in the middle of the experiment, say you use same type of calorimeter, but you borrowed from another group to perform part C and D? Why?
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.
1. What is the essence of determining the heat capacity of the calorimeter? Is it
possible to replace the calorimeter in the middle of the experiment, say you use
same type of calorimeter, but you borrowed from another group to perform part C
and D? Why?
2. Explain the temperature profiles of the contents of the calorimeter.
3. What is the relationship of the temperature with the calculated ΔH? Compare the
ΔH of the three reactions.
4. What is Hess’s Law? Explain which part(s) of the experiment (procedure and/or
treatment) it is applied.
5. What are/could be the possible sources of error in this experiment?
6. Suppose you had used 4.00 grams of NaOH(s) in Reaction 1. What would have
been the number of Joules released in the reaction? What effect would this have on
the value of X1?
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