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barium120
chem flash cards (3rd exam)
| Question | Answer |
|---|---|
| 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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