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chem flash cards (3rd exam)

the heat given off by a reaction negative exothermic reaction
the heat absorbed by a reaction positive endothermic reaction
the heat released in a chemical reaction run at constant pressure is equal to delta H
delta H and delta E are positive in what kind of reaction endothermic
the amount of energy needed to raise 1 g of a substance 1 degree celcius specific heat
the SI unit of energy is the joule
At ________ temperature the volume of a gas is ________ proportional to the number of moles constant, directly
according to guy lussacs law, if the Kelvin temperature of a gas sample is doubled, the gas samples pressure is doubles
according to the combined gas law, for a fixed amount of gas, the volume and pressure are sometimes inversely and sometimes directly proportional
what is STP 273 K and 1 atm, or 0 degrees C and 760 torr or 760 mm of Hg
the heat abosrbed per change in temperature heat capacity
C = q/delta t
q = m x c x delta T
PV=nRT combined or ideal gas law
Ptot = P1 + P2... daltons law
V proportional to 1/P or P proportional to 1/V boyles law
V proportional to T Charles law
V proportional to n avogadros law
P proportional to T gay-lussacs law
R = ? 0.0821
MW = ? DRT/P
rate of diffusion rate 2/rate 1 = square root of (MW1/MW2)
Density = MWP/RT
l represents? what orbital s, p, d...
same electronic configuration isoelectric series
fill lower energy levels first aufbau
no element has the same configuration pauli exclusions
fill the up spins, then the down spins Hunds rule of maximum spin
average size of atoms atomic radius
decrease across a period increase down a group atomic raduis size metallic character electonegativity
increase across a period decrease down a group ionization energy electron affinity electronegativity
transfer of electrons ionic bonds
sharing of electrons covalent bonds
conduct electricity metallic bonding
most electronegative fluorine, oxygen, nitrogen=chlorine
how many times faster will hydrogen gas effuse than nitrogen gas 3.74
at what temperature will the molar kinetic energy of He be the same as the molar kinetic energy of Ar at 300 k 300 K
atmospheric pressure can support a column of mercury 76 cm high. Approximately how high could a corresponding column of water be supported? the specific graavity of Hg is 13. 6. 1030 cm (multiply values)
which of the following has the largest atomic radii? Al Si P S Cl Al
whic of the following has the highest ionization energy? Li Na Mg Ca C C
Which of the following has the highest electron affinity? Si Cl P K Rb Cl
Which of the following elements is the least electronegative? Cl I O S Li Li
how many orbitals does a d sumshell contain? 5
the rule that states that no two electrons int he same atom can have the same four quantum numbers is known as: the pauli exclusion principle
what is the maximum number of electrons that an atom can have with the quantum number specification n=3 l=2 ml=2? 2
an atom of element X has three unpaired electrons. the element X most likely belongs to group: V
which of the following is the lowest energy radiation? microwaves
Created by: gingerallie



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