Chemistry Flashcards
0
Q
Redox (Reduction & Oxidation)
A
Ox.: lose electrons
Red.: gain electrons (ion’s reduced charge)
1
Q
Covalent bonds
A
Atoms share electrons
2
Q
Mixture Density
A
1/d = x(1)/d(1) + x(2)/d(2)
d: density
x: mass fraction
3
Q
Avogadro’s Number
A
6.024 * 10^23
How many atoms or molecules it takes to make the atomic or molecular weight in grams of the material.
4
Q
Heat of Combustion
A
The amount of heat yielded by the combustion of a fuel, expressed in units energy per mass of fuel.
5
Q
Heat Transfer by Radiation
A
Q/A = epsilon * sigma *T^4 Q/A: heat flux, energy/time-area A: area of transfer epsilon: emissivity of radiating body sigma: Stefan-Boltzmann constant T: abs. temp.
6
Q
Convective Heat Transfer
A
Q is proportional to A * Delta-T Q = HADelta-t Q: rate of transfer, energy/time A: area of transfer Delta-T: temp. diff. H: heat trans. coeff. of the fluid
7
Q
Heat Conduction
A
Q=K(A/L)(T(1) - T(2)) Q: rate of transfer, energy/time K: thermal conductivity coeff. of material A: area L: thickness T: temp.
8
Q
Free Radical
A
Ion w unpaired valence electron; “dangling” covalent bond
9
Q
Halogen Group
A
F, Cl, Br, & I
