There are three states of matter: solid, liquid and gas.
Diffusion is the movement of particles from a high concentration to a low concentration. Brownian motion is the diffusion of many particles.
The
kinetic theory of
matter attempts to explain the behaviour of matter in different
phases.
The kinetic theory of matter says that all matter is
composed of
particles which have a certain
amount of
energy which allows them to
move at different speeds depending on the
temperature (energy). There are
spaces between the particles and also
attractive
forces between particles when they come close together.
Intramolecular force is the force between the atoms of a molecule, which holds
them together. Intermolecular force is a force between molecules, which holds them together.
Understanding chemical bonds, intermolecular forces and
the kinetic theory of matter can help to explain many of the
macroscopic properties of matter.
Melting point is the
temperature at which a
solid changes its
phase to become a
liquid . The reverse
process (change in phase from liquid to solid) is called
freezing . The stronger the chemical bonds and
intermolecular forces in a substance, the higher the melting point will be.
Boiling point is the
temperature at which a liquid changes phase to become a gas. The reverseprocess (change in phase from gas to liquid) is called
condensing . The stronger the
chemical bonds and intermolecular forces in a substance, the higher the boilingpoint will be.
Density is a measure
of the mass of a substance per unit volume.
Viscosity is a
measure of how resistant a liquid is to flowing.
End of chapter exercises
Give one word or term for each of the following
descriptions.
The
property that determines how easily a liquid flows.
The change in phase from liquid to gas.
If one substance A has a melting point that is
lower than the melting point of substance B, this
suggests that...
A
will be a liquid at room temperature.
The chemical bonds in substance A are weaker than those
in substance B.
The chemical bonds in substance A are stronger than
those in substance B.
B will be a gas at room temperature.
Boiling point is an important concept to understand.
Define 'boiling point'.
What change in phase takes place when a liquid reaches
its boiling point?
What is the boiling point of water?
Use the kinetic theory of matter and your knowledge of
intermolecular forces to explain why water changes phase at this temperature.
Describe a solid in terms of the kinetic molecular theory.
Refer to the table below which gives the melting and
boiling points of a number of elements and then answer the questions thatfollow. (
Data from
http://www.chemicalelements.com )
Element
Melting
point
Boiling point (
)
copper
1083
2567
magnesium
650
1107
oxygen
-218,4
-183
carbon
3500
4827
helium
-272
-268,6
sulphur
112,8
444,6
What state of matter (i.e. solid, liquid or gas) will each of
these elements be in at room temperature?
Which of these elements has the strongest forces
between its atoms? Give a reason for your answer.
Which of these elements has the weakest forces between
its atoms? Give a reason for your answer.
In economics, a perfect market refers to a theoretical construct where all participants have perfect information, goods are homogenous, there are no barriers to entry or exit, and prices are determined solely by supply and demand. It's an idealized model used for analysis,
When MP₁ becomes negative, TP start to decline.
Extuples Suppose that the short-run production function of certain cut-flower firm is given by: Q=4KL-0.6K2 - 0.112 •
Where is quantity of cut flower produced, I is labour input and K is fixed capital input (K-5). Determine the average product of lab
Kelo
Extuples Suppose that the short-run production function of certain cut-flower firm is given by: Q=4KL-0.6K2 - 0.112 •
Where is quantity of cut flower produced, I is labour input and K is fixed capital input (K-5). Determine the average product of labour (APL) and marginal product of labour (MPL)
Quantity demanded refers to the specific amount of a good or service that consumers are willing and able to purchase at a give price and within a specific time period. Demand, on the other hand, is a broader concept that encompasses the entire relationship between price and quantity demanded
Ezea
ok
Shukri
how do you save a country economic situation when it's falling apart
Economic growth as an increase in the production and consumption of goods and services within an economy.but
Economic development as a broader concept that encompasses not only economic growth but also social & human well being.
Shukri
production function means
Jabir
What do you think is more important to focus on when considering inequality ?
sir...I just want to ask one question... Define the term contract curve? if you are free please help me to find this answer 🙏
Asui
it is a curve that we get after connecting the pareto optimal combinations of two consumers after their mutually beneficial trade offs
Awais
thank you so much 👍 sir
Asui
In economics, the contract curve refers to the set of points in an Edgeworth box diagram where both parties involved in a trade cannot be made better off without making one of them worse off. It represents the Pareto efficient allocations of goods between two individuals or entities, where neither p
Cornelius
In economics, the contract curve refers to the set of points in an Edgeworth box diagram where both parties involved in a trade cannot be made better off without making one of them worse off. It represents the Pareto efficient allocations of goods between two individuals or entities,
Cornelius
Suppose a consumer consuming two commodities X and Y has
The following utility function u=X0.4 Y0.6. If the price of the X and Y are 2 and 3 respectively and income Constraint is birr 50.
A,Calculate quantities of x and y which maximize utility.
B,Calculate value of Lagrange multiplier.
C,Calculate quantities of X and Y consumed with a given price.
D,alculate optimum level of output .
