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.
![**Transcription:**
**Question:**
How many grams of NaCl will be produced when 489.2 J of energy is released?
**Chemical Reaction:**
\[2 \text{Na}_{(s)} + \text{Cl}_2{(g)} \rightarrow 2 \text{NaCl}_{(s)}\]
**Reaction Enthalpy (\(\Delta H_{\text{rxn}}\)):**
\[-410.9 \, \text{kJ/mol}\]
**Explanation:**
This text is asking for the amount of sodium chloride (NaCl) produced when a certain amount of energy is released during a chemical reaction. The reaction provided shows that sodium (Na) reacts with chlorine gas (\(\text{Cl}_2\)) to form sodium chloride (NaCl), and this process has an associated enthalpy change of \(-410.9\) kJ per mole of reaction. The problem involves converting the given energy release (489.2 J) into the corresponding mass of NaCl produced.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe1112b9e-00e0-4998-a8d2-ad5657f231c4%2Fceaeecbb-c572-4047-b0a9-7acc54488c14%2Fgbyik0o_processed.jpeg&w=3840&q=75)
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