Part B A mole of X reacts at a constant pressure of 43.6 bar via the reaction X(g) +4Y(g)→2Z(g), AH® = -75.0 kJ mol-1 Before the reaction, the volume of the gaseous mixture was 5.00 L. After the reaction, the volume was 2.00 L. Calculate the value of the total energy change, AU, in kJ mol Express your answer with the appropriate units. > View Available Hint(s) HẢ ? AU = Value Units
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.
solveeee ab
![Part B
A mole of X reacts at a constant pressure of 43.6 bar via the reaction
X(g) +4Y(g)→2Z(g),
AH® = -75.0 kJ mol-1
Before the reaction, the volume of the gaseous mixture was 5.00 L. After the reaction, the volume was 2.00 L. Calculate the value of the total energy change, AU, in kJ mol-1
Express your answer with the appropriate units.
> View Available Hint(s)
HẢ
?
AU =
Value
Units](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2cf1e3eb-0795-4286-b6e5-17d7fffc7220%2F63e0fa4b-c305-4b54-abfc-0f84fd15a968%2Fmx79spm_processed.png&w=3840&q=75)
![Part A
Assuming constant pressure, rank these reactions from most energy released by the system to most energy absorbed by the system, based on the following descriptions:
A. Surroundings get colder and the system decreases in volume.
B. Surroundings get hotter and the system expands in volume.
C. Surroundings get hotter and the system decreases in volume.
D. Surroundings get hotter and the system does not change in volume.
Also assume that the magnitude of the volume and temperature changes are similar among the reactions.
Rank from most energy released to most energy absorbed. To rank items as equivalent, overlap them.
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Reaction A
Reaction B
Reaction C
Reaction D
Most energy released
Most energy absorbed](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2cf1e3eb-0795-4286-b6e5-17d7fffc7220%2F63e0fa4b-c305-4b54-abfc-0f84fd15a968%2Fk1pa3io_processed.png&w=3840&q=75)
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