Pendahuluan tentang Kimia

8/20/2019 Pendahuluan tentang Kimia

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Introduction to

Chemistry


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The Objectives:

Identify five traditional areas of studyin chemistry.

Relate pure chemistry to applied

chemistry. Identify reasons to study chemistry.


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Part I Areas of study in chemistry


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ChemistryThe study of:

the composition (make-up) of matter

the changes that matter undergoes


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What is matter? Anything that:

has mass

and

occupies space (volume).


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Mass vs Weight Mass: a measure of the amount of

matter that an object contains. (SI

unit kilogram, kg)

Weight: The force with which theearth pulls on an object. (SI unitNewton, N, kg m/s2)


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The 5 Branches of Chemistry

Inorganic

Organic

Analytical

Physical

Biochemistry


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Inorganic Chemistry The study of chemicals that do not

contain carbon.


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Organic Chemistry The study of chemicals that contain

carbon.

Origin: study of chemicals in livingorganisms.


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Organic or Inorganic ?

Sulfuric Acid H2SO4

Methane CH4

Hydrochloric Acid HCl

Ethane C2H6


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Analytical Chemistry Composition of matter.

http://besg.group.shef.ac.uk/Facilities/Images/gcms.JPG

Ex:Mass SpectrometerGas Chromatograph


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Physical Chemistry The study of :

The mechanism

The rate

The energy transfer

that happens when matterundergoes change.


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Biochemistry Study of processes that take place

in organisms.

Chemistry of living things


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ScienceWhat?

Why?

How?

When?


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Science and Technology Science Pure

Does not necessarily have anapplication.

Technology Applied

Has practical applications in society. Engineering.


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Question: Science or Technology?

Studying or forming aspirin in a lab in

small scale/pilot plans(small amounts).


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Producing aspirin tablets so thatconsumers can use them.

Question: Science or Technology?


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Example: Discovery of Nylonby Wallace Carothers in 1930’s

http://www.chemheritage.org/EducationalServices/nylon/nylon.html

http://heritage.dupont.com/touchpoints/tp_1935-2/depth.shtml

http://www.chemheritage.org/EducationalServices/nylon/nylon.htmlhttp://heritage.dupont.com/touchpoints/tp_1935-2/depth.shtmlhttp://heritage.dupont.com/touchpoints/tp_1935-2/depth.shtmlhttp://www.chemheritage.org/EducationalServices/nylon/nylon.html


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Microscopic- Macroscopic

Micro –(small)

Microscopic- objects can be seen witha microscope.

Macro-(from afar) Macroscopic- objects are seen

without a microscope.


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Physical chemistry

A physical chemist studyfactors that effect breathingrates during exercise

Organic chemistry

Athletes inhale chemicalsdeveloped by organic chemistto control symptoms ofasthma.

Analytical chemistry

Analytical chemist developtest to detect chemicals in theblood. The test help to show if

organs in the body areworking properly.

Biochemistry

A biochemist study how theenergy used for the

concentration of muscles isd d d t d

Inorganic chemistry

An organic chemist explainhow a lack of calcium canaffect the growth and repairof bones.

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Pendahuluan tentang Kimia