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