Match the key terms with the following descriptions. (a) �le smallest particle of an element that retains �le characteristic chemical properties of that element a change in which substances are converted into new substances that have compositions and properties different from those of the original (b) substances (c) anything that occupies space and is perceptible to the senses (d) a substance composed of two or more elements combined in de�nite proportions (e) a combination of atoms of one or more elements (f) a process Characterized by Changes only in �le physical properties of a substance not in its composition (g) the physical state in which matter has no �xed shape or volume but expands to �ll its container completely (h) �le energy possessed by an object because of its position (i) a tentative explanation for the properties or behaviour of matter that accounts for a set of observations and can be tested (j) the energy possessed by an object because of its motion
Match the key terms with the following descriptions. (a) �le smallest particle of an element that retains �le characteristic chemical properties of that element a change in which substances are converted into new substances that have compositions and properties different from those of the original (b) substances (c) anything that occupies space and is perceptible to the senses (d) a substance composed of two or more elements combined in de�nite proportions (e) a combination of atoms of one or more elements (f) a process Characterized by Changes only in �le physical properties of a substance not in its composition (g) the physical state in which matter has no �xed shape or volume but expands to �ll its container completely (h) �le energy possessed by an object because of its position (i) a tentative explanation for the properties or behaviour of matter that accounts for a set of observations and can be tested (j) the energy possessed by an object because of its motion
Solution Summary: The author defines a chemical change as the change in which substances are converted into new substances having different compositions and properties.
Match the key terms with the following descriptions.
(a) �le smallest particle of an element that retains �le characteristic chemical properties of that element a change in which substances are converted into new substances that have compositions and properties different from those of the original
(b) substances
(c) anything that occupies space and is perceptible to the senses
(d) a substance composed of two or more elements combined in de�nite proportions
(e) a combination of atoms of one or more elements
(f) a process Characterized by Changes only in �le physical properties of a substance not in its composition
(g) the physical state in which matter has no �xed shape or volume but expands to �ll its container completely
(h) �le energy possessed by an object because of its position
(i) a tentative explanation for the properties or behaviour of matter that accounts for a set of observations and can be tested
(j) the energy possessed by an object because of its motion
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).
The table includes macrostates characterized by 4 energy levels (&) that are
equally spaced but with different degrees of occupation.
a) Calculate the energy of all the macrostates (in joules). See if they all have
the same energy and number of particles.
b) Calculate the macrostate that is most likely to exist. For this macrostate,
show that the population of the levels is consistent with the Boltzmann
distribution.
macrostate 1 macrostate 2 macrostate 3
ε/k (K) Populations
Populations
Populations
300
5
3
4
200
7
9
8
100
15
17
16
0
33
31
32
DATO: k = 1,38×10-23 J K-1
Don't used Ai solution
In an experiment, the viscosity of water was measured at different
temperatures and the table was constructed from the data obtained.
a) Calculate the activation energy of viscous flow (kJ/mol).
b) Calculate the viscosity at 30°C.
T/°C
0
20
40
60
80
η/cpoise 1,972 1,005 0,656 0,469 0,356
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The Bohr Model of the atom and Atomic Emission Spectra: Atomic Structure tutorial | Crash Chemistry; Author: Crash Chemistry Academy;https://www.youtube.com/watch?v=apuWi_Fbtys;License: Standard YouTube License, CC-BY