powerpoint presentation

2. Gas are important factors in sustaining life here on
earth. For animals and humans, oxygen is very
important because both organisms utilize it where
different biological processes are involved, such as
cellular respiration. Carbon dioxide is expelled by
human which is, In turn, is consumed by plants
through the process of photosynthesis. Thus, a cycle
continues so that the amount of oxygen and carbon
dioxide are maintained at their expected levels.

3. QUANTIFIABLE PROPERTIES OF GASES
The characteristics of gases are described fully in
terms of four parameters or measurable properties such
as volume, pressure, temperature, and the number of
moles.
A. Volume
The volume of solid object is the amount of space
occupied by it. It is the derived unit , because it is a result
from another measurements.

4. However, the volume of gas is mostly affected by two
factors namely, temperature and pressure. Generally, the
volume of an object increase with an increase in temperature
and decrease with an increase in pressure. Some exceptions
exist to this general rule such as in the case of water. The
volume of a gas is measured in terms of the following SI units
and conversion:
Basic SI Unit : m3 (cubic meter)
Derived Units : liter (L)
1L = 0.001m3
1 cm3 = 0.001L

5. B. Pressure
Pressure is defined as the force applied per unit area.
We use the term pressure to refer to the behavior of
fluids such as liquids and gases rather than the word
force.
As you go above the surface of the Earth, the air gets
thinner with increasing altitude. This is the reason why
mountain climbers sometimes need oxygen tank to
breathe to reach the summit. For example, Mt. Everest’s
altitude is so high that the amount of breathable oxygen
is so low. A barometer measures atmospheric pressure,
which is also called barometric pressure.

6. C. Temperature
Temperature refers to the hotness or coldness of an
object. It is also defined as the measure of the average
kinetic energy of the particles in an object, which is a type
of energy associated with motion. Particles that are in
motion are said to have kinetic energy. The faster the
particles are moving, the more kinetic they have. However,
particles do not have the same amount of kinetic energy.
Thus, when we measure the temperature of an object with
the use of a thermometer we are actually getting the
average kinetic energy.

7. The faster the molecules of the substance move
means the higher the temperature. For example, dyes
will spread more rapidly through hot water than cold
water. This is because of the increased motion of the
molecules. The number of molecules of an object does
not affect the temperature. Under certain conditions, the
temperature of 20 ml and 50 ml samples of boiling
water are equal. Thus, we can say that the average
kinetic energy of the molecules is the same for two
different quantities of water.

8. D. Number of Particles
1 mole = 6. 02 x 1023 or
1 mole = Avogadro’s number
Unlike temperature, the mole depends on the number
of particles. The higher the number of moles means the
higher the amount of substance.