For the combustion reaction below: C3H8 (g) + 5 O2 (2) 3 CO2 (2) + 4 H20 (g) Predict the signs of the change in enthalpy and the change in entropy. [ Select] Under what conditions will this reaction be spontaneous? [ Select ]
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.
Box 1 and 2
Box 1 answer choices: in image
box 2 answer choices: at NO temperatures (never spontaneous), only at LOW temperatures, only at HIGH temperatures, or at ALL temperatures (always spontaneous).
![For the combustion reaction below:
\[ \text{C}_3\text{H}_8 \, (g) + 5 \, \text{O}_2 \, (g) \rightarrow 3 \, \text{CO}_2 \, (g) + 4 \, \text{H}_2\text{O} \, (g) \]
Predict the signs of the change in enthalpy and the change in entropy.
\[ \text{[ Select ]} \]
Under what conditions will this reaction be spontaneous?
\[ \text{[ Select ]} \]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F57117051-d013-4223-9396-a647a7daf985%2Fea4c0666-7c72-42e4-93dc-dca0da3d4b12%2Fyumrz3b_processed.jpeg&w=3840&q=75)
![For the combustion reaction below:
\[ C_3H_8(g) + 5 O_2(g) \rightarrow 3 CO_2(g) + 4 H_2O(g) \]
Predict the signs of the change in enthalpy and the change in entropy.
### Options:
- ΔH(−), ΔS(+)
- ΔH(+), ΔS(+)
- ΔH(+), ΔS(−)
- ΔH(−), ΔS(−)
### Question:
Under what conditions will the reaction be spontaneous?
### Explanation:
This exercise asks you to analyze the combustion reaction of propane (\(C_3H_8\)) with oxygen (\(O_2\)) and predict the signs of changes in enthalpy (\(ΔH\)) and entropy (\(ΔS\)). You are provided with multiple-choice options to determine whether each is positive or negative. Additionally, consider under what conditions the reaction would be spontaneous.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F57117051-d013-4223-9396-a647a7daf985%2Fea4c0666-7c72-42e4-93dc-dca0da3d4b12%2Fcj4f85h_processed.jpeg&w=3840&q=75)
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