The sign of ΔS sys expected for given vaporization process has to be predicted. Concept introduction: Entropy change: The sign of ΔS o for a reaction is determined by using the following rules: When a molecule is broken down and gives two or more smaller molecules. When the moles of gas is increases (by the breaking of molecules) Solid changes to liquid or gas state or liquid state changes to gas state. Entropy ( S ) : it is used to describe the disorder. It is the amount of arrangements possible in a system at a particular state. If the disorder increases in a system, then Δ S > 0 positive If the disorder decreases in a system, then Δ S < 0 negative If the disorder equal in a system, then Δ S = 0
The sign of ΔS sys expected for given vaporization process has to be predicted. Concept introduction: Entropy change: The sign of ΔS o for a reaction is determined by using the following rules: When a molecule is broken down and gives two or more smaller molecules. When the moles of gas is increases (by the breaking of molecules) Solid changes to liquid or gas state or liquid state changes to gas state. Entropy ( S ) : it is used to describe the disorder. It is the amount of arrangements possible in a system at a particular state. If the disorder increases in a system, then Δ S > 0 positive If the disorder decreases in a system, then Δ S < 0 negative If the disorder equal in a system, then Δ S = 0
Definition Definition Substance that constitutes everything in the universe. Matter consists of atoms, which are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction: solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chapter 20, Problem 20.14P
(a)
Interpretation Introduction
Interpretation:
The sign of ΔSsys expected for given vaporization process has to be predicted.
Concept introduction:
Entropy change:
The sign of ΔSo for a reaction is determined by using the following rules:
When a molecule is broken down and gives two or more smaller molecules.
When the moles of gas is increases (by the breaking of molecules)
Solid changes to liquid or gas state or liquid state changes to gas state.
Entropy(S): it is used to describe the disorder. It is the amount of arrangements possible in a system at a particular state.
If the disorder increases in a system, then ΔS>0 positive
If the disorder decreases in a system, then ΔS<0 negative
If the disorder equal in a system, then ΔS=0
(b)
Interpretation Introduction
Interpretation:
The sign of ΔSsys expected for solid explosive converts to gas process has to be predicted.
Concept introduction:
Entropy change:
The sign of ΔSo for a reaction is determined by using the following rules:
When a molecule is broken down and gives two or more smaller molecules.
When the moles of gas is increases (by the breaking of molecules)
Solid changes to liquid or gas state or liquid state changes to gas state.
Entropy(S): it is used to describe the disorder. It is the amount of arrangements possible in a system at a particular state.
If the disorder increases in a system, then ΔS>0 positive
If the disorder decreases in a system, then ΔS<0 negative
If the disorder equal in a system, then ΔS=0
(c)
Interpretation Introduction
Interpretation:
The sign of ΔSsys expected for Diffusion of perfume vapors in room has to be predicted.
Concept introduction:
Entropy change:
The sign of ΔSo for a reaction is determined by using the following rules:
When a molecule is broken down and gives two or more smaller molecules.
When the moles of gas is increases (by the breaking of molecules)
Solid changes to liquid or gas state or liquid state changes to gas state.
Entropy(S): it is used to describe the disorder. It is the amount of arrangements possible in a system at a particular state.
If the disorder increases in a system, then ΔS>0 positive
If the disorder decreases in a system, then ΔS<0 negative
7. What is the IUPAC name of the following compound?
A) (R)-1-oxo-2-butanol
C) (R)-2-hydroxybutanal
E) (S)-1-formyl-1-propanol
B) (S)-1-oxo-2-butanol
D) (S)-2-hydroxybutanal
OH
H
Cual es la formula semidesarrollada del 3-metil-1-butino?
2. A graph shown below shows first ionization energies for elements from H to Ne.
First ionization energy/kJ mol
2500
2000
1500
1000
500
T
T
T
T
1
2
3
5
6
7
8
9
10
Atomic number
a) Using arguments of electronic structure, explain why ionization energy of Li is much
lower than that of H.
(2 points)
then dips at O.
b) Using the same arguments, explain why ionization energy increases from B to N, and
(3 points)
Chapter 20 Solutions
Chemistry: The Molecular Nature of Matter and Change
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The Laws of Thermodynamics, Entropy, and Gibbs Free Energy; Author: Professor Dave Explains;https://www.youtube.com/watch?v=8N1BxHgsoOw;License: Standard YouTube License, CC-BY