Pendahuluan tentang Kimia
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Transcript of 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.