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.

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.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

Energy cannot be created nor destroyed, but it can
be transferred between a reaction and its
surroundings. The change in energy, AE, is
positive if the reaction absorbs energy, and it is
negative if the reaction releases energy. You may
also see this expressed in terms of change in
internal energy, AU. For the purposes of this
question, AU and AE are equal.
One way a reaction can transfer energy to or from
the surroundings is by releasing or absorbing heat.
A reaction can also transfer energy, in the form of
work, through a change in volume. The total
change in energy is the sum of the heat and work:
AE=q+w
At constant pressure, q =
and so
AH and w=-.
- PAV
AE=AH - PAV
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.
► View Available Hint(s)
Reaction A
Most energy released
Reaction B
Reaction C
Reaction D
Reset
Help
Most energy absorbed

Part B
A mole of X reacts at a constant pressure of 43.0 atm via the reaction
X(g) +4Y(g)→2Z(g), AH° = -75.0 kJ
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, AE, in kilojoules.
Express your answer with the appropriate units.
► View Available Hint(s)
μA
ΔΕ = Value
Submit
Units
= ?

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