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1st SemCPE > Chemestry for Engr > Flashcards

Chemestry for Engr Flashcards

1
Q

What is matter?

A

Anything that ocupy space and has volume.

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2
Q

Properties of matter

A 
Intrinsic
Extrinsic
Intensive
Extensive
Physical
Chemical
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3
Q

Intrinsic?

A

Permanent like salt’s taste, Salty

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4
Q

Extrinsic

A

Not permanent. Varies of the object, volume depends on mass and density

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5
Q

Intensive

A

Measurable but not dependent on the amount

ex. Boiling point

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6
Q

Extensive

A

Measurable and varies to the amount

ex. Size

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7
Q

Physical Change?

A 
Change that happen and can be observed
ex.
Liq to Gas- Evaporation
Gas to liq - Condensation
Liq to sol- Solidification
Sol to liq - Melting
Gas to sol - Deposition
Sol to gas - Sublimation
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8
Q

Chemical Change

A

ex.
Fe + O(2) = 2Fe(3)O(3) rusting
envolves combomation of elements to form new.

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9
Q

Classification of matter

A

Pure substance which can be devided to 2, Elements and Compound, Under Elements there are 3, Metals, Metalloids, Nonmetals.

and the second one is Mixture which is devided to 2, Homogeneous and Heterogeneous, Under Homo is Solution and under Hetero is Colloids and Sunpensions.

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10
Q

What is 7 SI?

A

The 7 international standard for base units

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11
Q

What are the 7 SI?

A 
Mass(kg)
Time(s)
Length(m)
Temperature(K)
E. current(A)
No. of particles(mol)
light intensity(cd)
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12
Q

Quantity of matter contained in an object (process by weighing)

A

Mass

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13
Q

Force that gravity exerts on an object

A

Weight

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14
Q

What is Lenght(m) cubed

A

Volume

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15
Q

Intensive property; ratio of an object’s mass to its volume

A

Density

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16
Q

How to get the volume of an Iregular shape?

A

Water displacement method

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17
Q

Density formula

A

D=M/V

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18
Q

Mass formula

A

M=D×V

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19
Q

Volume formula

A

V=M/D

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20
Q

F° To C°

A

F°=(1.8 × C°) + 32

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21
Q

C° to F°

A

C°=(F°-32)÷1.8

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22
Q
  1. K to C°

2. C° to K

A
  1. C°+273.15

2. K-273.15

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23
Q

Malapit sa target pero ung tama di magkakadikit

A

Accuracy

24
Q

Malapit sa target at the same time malapit din sa isa’t isa

A

Precision

25
Q

Refers to the largely emperical description

A

Models

26
Q

Assumption about the behavior of a system

A

Theory

27
Q

Widely accepted, well defined, well tested theories

A

Laws

28
Q

3 levels of understanding

in learning chemistry

A

Macroscopic
Microscopic
Symbolic

29
Q

Units

A

Designate the type of quantity measured
Ex. Mass - Kg
Kg is the unit

30
Q

Prefixes

A

The scale added to the base units
Ex. 100 kg
Kilo is the prefix scale given in grams

31
Q

Derived units

A

combination of base units

32
Q

Scientific notation

A

Use to write very small or very large numbers.

33
Q

Errors in the measurements

A

Ramdom error- Measurement that is Randomly too high or to low (associated with equipnent limitation)

Systematic error- Measurement that is Consistently too high or to low (pressence of impurity)

34
Q

Atom

A

Basic unit of element
From the greek word atomos
means uncuttable indivisible by Democritus

35
Q

Jhon Dalton

A

1808

Dalton’s Atomic Theory

Elements are composed of extremely small particles called atoms

Chemical reaction only involves the separation, Combination and Arangement; not destructed or created

36
Q

Joseph Jhon Thomson

A

1897

Discovered electron

Plum pudding model 1904
electron were distributed throuout the atom.

37
Q

Earnest Rutherford

A

Gold foil experiment or geiger-marsden experiment

Discovered atomic nucleus

38
Q

James Chadwick

A

Discoverd Neutron 1932

39
Q

Neil Bohr model of an atom

A

Nucleus Centermost part where protons and nuetrons are located.

Energy level/orbit/shell- where electrons are located

Valence electrons- electrons in the outermost energy level

40
Q

Modern atomic model

A

Electrons are clouds of (-) charge sorrounding Nuclues

41
Q

Scanning and tunneling microscope

A

invented by Gerd Binning and Heinrich Rohrer

an instrument for imaging surfaces of thr atomic level

42
Q

Atomic Number

A

Number of protons in a nucleus

if atom is nuetral: No. of protons is= No. of electrons

43
Q

Mass number

A

Sum of protons and nuetrons

44
Q

Isotopes

A

Atom that have the same atomic no. bit different mass no.

45
Q

Isotopic abundance

A

Mass percentage of an isotope in an naturally occuring element.

46
Q

Atomic mass

A

Also known as atomic weight
Atomic mas unit (amu)
exactly equal to 1/12 of the mass of carbon-12 atom

47
Q

Ability to conduct electricity

A
  • Electrolytes-Aqueous solution that are capable of conducting electricity (Exist as Ions)
  • Non-Electrolytes-Aqueous solutions that doesnt conduct electricity(Nuetral molecules)
48
Q

Oxides

A

Contains oxygen

49
Q

Salt

A

Ionic compound containing Cation except H+
and Anion except OH
produced by nuetralizing acid and base.

50
Q

Ions

A

Charge particles

formed when electrons are lost or gained

51
Q

Cation

A

electron lost; Net positive charge

52
Q

Anion

A

Electron is gained; Net negative charge

53
Q

Mono atomic

Poly atomic

A

Single atom

group of atoms

54
Q

Molecules

A

aggregate of atleast 2 atoms; Electrically nuetral

55
Q

Diatonic mol

Polyatomic mol

A

Containing 2 atoms of the same element(H(2))
or different element (CO)

Contains more than 2 atoms (H20,NH3)

1st SemCPE (3 decks)

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