1. Consider the reaction in which methane CH4(g) is reacts with O2(g) to form CO₂(g) and H₂O(g). Using the reference data included at the front of the exam, choose the correct statement below describing the heat exchange between the reaction system and the surroundings: (A) Heat will be transferred to the reaction system, therefore the surroundings will get colder. (B) Heat will be transferred to the reaction system, therefore the surroundings will get warmer. (C) Heat will be transferred from the reaction system, therefore the surroundings will get colder. (D) Heat will be transferred from the reaction system, therefore the surroundings will get warmer. (E) No heat will be exchanged and the surroundings will remain at the same temperature.
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. Consider the reaction in which methane CH4(g) is reacts with O₂(g) to form
CO₂(g) and H₂O(g). Using the reference data included at the front of the exam,
choose the correct statement below describing the heat exchange between the
reaction system and the surroundings:
(A) Heat will be transferred to the reaction system, therefore the surroundings
will get colder.
(B) Heat will be transferred to the reaction system, therefore the surroundings
will get warmer.
(C) Heat will be transferred from the reaction system, therefore the
surroundings will get colder.
(D) Heat will be transferred from the reaction system, therefore the
surroundings will get warmer.
(E) No heat will be exchanged and the surroundings will remain at the same
temperature.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fcb45a7b7-d1aa-4ac7-ad98-90aa0325071f%2F08ab6acf-993a-4584-bac9-196e27b66e96%2F4vqdh9t_processed.png&w=3840&q=75)
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