When H,S(g) reacts with O2(g) to form H,0(g) and SO2(g), 124 kcal of energy are evolved for each mole of H,S(g) that reacts. Write a balanced equation for the reaction with an energy term in kcal as part of the equation.
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.
![### Energy Evolution in the Reaction of H₂S and O₂
When hydrogen sulfide (H₂S) reacts with oxygen (O₂) to form water (H₂O) and sulfur dioxide (SO₂), 124 kcal of energy are evolved for each mole of H₂S that reacts.
**Task:**
Write a balanced equation for the reaction with an energy term in kcal as part of the equation.
**Instructions:**
Use the smallest integer coefficients possible and put the energy term in an appropriate box. If a box is not needed, leave it blank.
**Balanced Equation:**
\[ \boxed{2} \text{H}_2\text{S(g)} + \boxed{3} \text{O}_2\text{(g)} + \boxed{ } \rightarrow \boxed{2} \text{H}_2\text{O(g)} + \boxed{2} \text{SO}_2\text{(g)} + \boxed{124} \text{ kcal} \]
This balanced equation shows that 2 moles of hydrogen sulfide gas react with 3 moles of oxygen gas to produce 2 moles of water vapor and 2 moles of sulfur dioxide gas, releasing 124 kcal of energy.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fa527ffdc-16df-4a1f-9953-96956a75d05e%2Fed8828dd-0476-4520-9202-9461a09aca01%2F3jqytq.png&w=3840&q=75)
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