Chemistry for Engineers Flashcards
Boyle’s Law is also known as
Mariotte’s Law
the pressure that a gas will exert in a container assuming it were alone
Partial pressure
What is the empirical formula of the Human DNA?
C39H50O22N15P3
denotes the bonds formed between the atoms of a molecule
Empirical Formula
denotes the actual number of each atom in a molecule
Molecular Formula
“effective” bulletproof vest
Polyethylene Fiber
UHMWPE
Ultra-high Molecular Weight Polyethylene
bulletproof vest; Kevlar
Polyamide Fiber
bulletproof windows
Polycarbonate Fiber
flexiglass; Common Material of Construction for Radiation Protection
Polymethcrylate Fiber
3 Fundamental Laws of Stoichiometry
- Law of Conservation of Mass
- Law of Definite Comparison
- Law of Multiple Proportions
matter can not be created nor destroyed but only change from one form into another
Law of Conservation of Mass
- Antoine Lavoisier
regardless of its extensive amount, the % composition of a molecule’s components remains constant
Law of Definite Comparison
- Joseph Louis Proust
atoms have the tendency to bond in a appreciable whole number, integers, each being a distinct compound
Law of Multiple Proportions
- John Dalton
To which subatomic particle does each statement refer to:
(a.) Has a positive charge
(b.) Cannot be found inside the nucleus
(c.) Has the smallest mass
(d.) Has a neutral charge
Proton, Electron, Electron, Neutron
Who discovered electron?
J. J. Thomson (Plum-Pudding Model)
- Cathode Ray Experiment
Who coined the term “electron”
George Stoney
Who conducted the Oil Drop Experiment?
Robert Millikan
Who discovered proton?
Ernest Rutherford (Rutherford Atomic Model)
Experiment conducted by Ernest Rutherford
Geiger-Morsden Experiment
Who discovered neutron?
James Chadwick
Which among the following statements regarding Classical Physics and Quantum Theory is TRUE?
I – Robert Bunsen proposed that Energy, like matter, is discontinuous.
II – Quantum Theory places no limitation on the amount of energy that a system may possess.
III – The energy of a quantum of electromagnetic radiation is proportional to the frequency of the radiation.
III only
Who proposed that energy, like matter, is discontinuous?
Max Planck
The first spectroscope of energy
Robert Bunsen and Gustav Kirchoff
Caesium came from the Latin term
“Caesius” - sky blue
Rubidium came form the Latin term
“Rubidius” - deep red
Helium came from the Greek term
“Helios” - the sun
It places no limitation on the amount of energy that a system may possess
Classical Physics
Energy that a system may possess must be finite and discrete
Quantum Theory
Who proposed the photoelectric effect?
Heinrich Hertz
An energy that binds the electron on the surface of a metal
Work Function
It states than light can behave as either a wave or a particle (photon)
- Albert Einstein
Wave - Particle Duaity
The minimum frequency that a ight must possess in order to initiate the photoelectric effect
Threshold Frequency (f0)
The bonds between the atom of a molecule
Intramolecular Forces
The bonds between the molecular, identical or not
Intermolecular Forces
The weakest IF. Also known as dispersion forces, London forces, or instantaneous dipole - induced dipole forces. Present in every molecule.
Van der Waals Forces
The tendency of a molecule to undergo electron redistribution due to the pressure of an external field
Polirazibility
Stronger that Van der Waals forces. Can only occur in a polar molecule. The alignment of the partial positive pole of one molecule to the partial negative pole of another molecule.
Dipole - Dipole Forces
