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What is a physical property?
- its any property that is measurable, whose value describes a state of a physical system.

There are different types of physical properties such as:
1. Melting point
2. Freezing point
3. Boiling point
4.Flash point
5.Smoke point
6.Cloud point

What is freezing point?
- the temperature at which a liquid turns into a solid.

What affects freezing point?
1. Impurities; Organic, foreign substances

Applications of freezing point:
1. Food preservation
2. Slow food decay/growth of micro-organism
3.Maintains product quality
4.Test for purity

# data[].attributes.body
What are physical properties???
- Properties that do not change chemical nature of matter.

Physical Property
Freezing Point:

- Liquids turns into a solid when it is cold enough.
- Normal freezing point happens at 1atm
- Most liquids freeze by crytalization
- Material such as a glass are called Amorphous solids ( they do not have true freezing point as it has no abrupt phase change )
- Factors affecting freezing point
- Addition of solutes
- Types of molecules

- Freezing point analyzer
- Aviation Fuel
- Diesel oil
- Determine purity of aromatic compounds.

-Applications Of Freezing Point
- Common method of food preservation
- Slows food decay and growth of micro-organisms
- Maintain product quality for aviation fuels
- Test for purity for aromatic compounds

THE END PE

# data[].attributes.body
What are Physical Properties?
- Properties that do not change the chemical nature of matter.
- Properties that are readily observable.

Some examples of Physical Properties:
1. Boiling Point
2. Freezing Point
3. Melting Point
4. Cloud Point
5. Smoke Point
6. Appearance & etc.

What is Melting Point?
-  Temperature range at which it changes state from solid to liquid.
- It can be used as an indication for purity.
- As heat is applied to a solid, temperature will increase until melting point is reached.
- As compared to boiling point, melting point is relatively insensitive to pressure as the solid/liquid transition represents only a small change in volume.
- There are two commonly used analyzers to determine melting point:
1. Mel - Temp
2. Fisher - Johns

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The types of physical properties are:
-Boiling point: Liquid start to reach at a temperature at boiling point. Particles started to vibrate and move further apart and randomly to the surrounding at high speed .Temperature remains constant at boiling point and it changes to gas.
- Low pressure, low boiling point
E.g Rotary evaporator. It helps to decrease the boiling point of liquid as vacuum helps to decrease pressure, thus boiling point decreases.
- use thermometer to measure boiling point
- boiling point occur throughout the liquid and occur at fixed temperature

https://www.youtube.com/watch?v=RN0XF9qQB6M

# data[].attributes.body
What is a Physical Property ?
- It is a property that are observable easily.
eg; appearance of a substances such as texture, colour, sharpness and hard/soft, by using our five senses.

Examples of other physical properties:
-Melting Point
-Freezing Point
-Boiling Point
-Flash Point
-Smoke Point
-Cloud Point

What is Smoke Point?
- In general, smoke point of an oil = temperature at which it starts to break down and form smoke.

Factors affecting smoke point of oil:

-presence of foreign properties(batter)

Impurites will affect and increase the boiling point
- temperature to which oil is heated
Each type of oil has its own heated temperature.
Heat energy is transferred fromheat source to another as energy is nor created nor destroyed.

-length of time the oil is heated
The longer the oil is heated the more quickly it will decomposed. The oil molecules of the oil will become smaller which means that the oil will evaporated faster. Therefore, it will reach the smoking point faster.

Number of times the oil is used
- colour change can be seen in cooking oil) as the unsaturated oil became to saturated oil due to process of cooking food.

# data[].attributes.body
Physical properties is the properties that do not change the nature of matter. (seen right away)
e.g : by using your 5 senses.

Example : Smoke point

The temperature at which oil or fat start to break down to form smoke.

how is it useful?

Combustion qualities
->serve as a warning as smoke point is close to flash point and fire point.

-Quality of oil
help find better method to determine the quality of fuel.

Factors affecting:
1.Presence of impurities
2.Temperature
3. number of time or length of time the oil is used.

SMOKE POINT ANALYZER :
used in petroleum industries to determine smoke point of hydrocarbon fuel.

Sample is first burnt in the smoke point lamp in which flame height can be adjusted.

measuring the maximum flame height before the formation of smoke is then compared to a set of known standards.

Image of a smoke point lamp:

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Physical properties includes it`s appearance, properties that do not change the chemical nature of matter...Properties that are readily observable....

There are different types of physical properties such as:
1. Melting point
2. Freezing point
3. Boiling point
4.Flash point
5.Smoke point
6.Cloud point
FREEEEEEZING POINT

Freezing point..what is that?
A process whereby liquid changes from a liquid state to a solid state (not a chemical reaction), when the temp is low enough...

What affects freezing point?
note that different types of  liquids have different freezing points as well as depending on the pressure of the atmosphere the liquid is placed.

Factors affecting freezing point..
addition of soluble materials where freezing point is lowered when adding of soluble materials in to the solution...

Types of molecules
if the inter-molecular forces are strong, the freezing point will increase, and vice versa

Most liquids freeze by crystallization,  where crystalline solids form throughout the liquid...however glass and glycerol hardens without crystallization
..they are called amorphous solids (no periodic arrangement even microscopically)...these solids DO NOT have a true freezing point...

freezing point analyzer..
the freezing point of the sample is determined where the last wax crystal disappears and no light is being detected.

# data[].attributes.body
physical properties is any matter that can be measured. there is also changes in state and appearance. It does not change the chemical nature of matter and can be observed at all times.
Appearance, opacity colour, texture, hardness, softness, shapes and sizes.

Change of state: solid, liquid, gas

1. boiling point
2. freezing point
3. flash point
4. melting point
5. smoke point
6. cloud point
7. density
8. bitterness
9. elasticity
10. viscosity