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CLEP Chemistry 1

Subjects : clep, science, chemistry
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. For a cell at concentrations and conditions other than standard - a potential can be calculated using this equation.






2. *Molecules of ideal gases have no attraction for one another and have no intrinsic volume - they are ______ _____






3. When the electron moves from the ground state to an excited state - it ______ energy.






4. The action of salts of weak acids or bases with water to form acidic or basic solutions.






5. *The nature of the reactants and products affect chemical reactions because some elements and compounds have bonds that when broken/formed - react more rapidly with each other than others.






6. Cells that convert electrical energy into chemical energy.






7. _______ has very little effect on the solubility of liquids or solids in liquid solvents.






8. The change in enthalpy of an exothermic reaction is ________.






9. A law stating that at constant pressure - the volume of a given quantity of a gas varies directly with the temperature.






10. The law stating that in any spontaneous process there is an increase in the entropy of the universe.






11. Increasing the pressure on a system at equilibrium will cause a shift in the position of equilibrium in the direction of the fewest number of ______ of gaseous reactants or products.

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12. Metals have electronegativities less than ____






13. The pressure exerted by the gas molecules when they are in equilibrium with the liquid.






14. **Five factors that affect reaction rates: 1. The nature of the reactants and products. 2. The surface area exposed. 3. The concentrations. 4. The temperature. 5. The catalyst.






15. The normal boiling point of a liquid is the temperature at which its vapor pressure is 760mm Hg.






16. A law stating that the vapor pressure of a solution at a particular temperature is equal to teh mole fraction of the solvent in the liquid phase multiplied by the vapor pressure of the pure solvent at the same temperature.






17. The heat change during a process carried out at a constant pressure.






18. The heat required to change 1mole of solid completely to vapor.






19. A pure crystal of elemental metal consists of roughly Avogrado's number of atoms held together by ________ bonds.






20. Gases are composed of tiny - invisible molecules that are widely separated from one another in otherwise empty space.






21. The molecules in a gas are in constant - continueous - random - and straight-line motion.






22. This is due to the way positive charges of one molecule attract the negative charges of another molecule. Compounds of the solid state that are bound mainly by this type of attractive have soft crystals - are easily deformed - and vaporize easily.






23. *Each wave function corresponds to a certain electron energy and describes a region about the nucleus (orbital) where an electron having that energy may be found.






24. In an endothermic process - energy is absorbed and ^E is _______.






25. *The Concentration usually _____ the chemical reaction rate with increasing concentrations of the reactants.






26. Rays made up of electrons in basic electron charges.






27. The process of determining the amount of a solution of known concentration that is required to react completely with a certain amount of a sample that is being analyzed.






28. The pressure of a gas is the result of collisions between the gas molecules and the walls of the container.






29. When the rate of evaporation equals the rate of condensation - the system is in __________.






30. The vapor pressure of an aqueous solution is always lowered by the additon of more solute - which causes the boiling point to be raised.






31. When solids are heated at certain perssures - some solids vaporize directly without passing through the liquid phase.






32. For a ________ reaction - the energy liberated in the exothermic reaction equals the energy absorbed in the endothermic reaction.






33. Deviations from Boyles law that occur with real gases represent _______ behavior.






34. Reactions that do not occur spontaneously can be forced to take place by supplying energy with an external current.






35. The particular portion of the universe on which we wish to focus our attention. Everything else is called the surroundings.






36. This process occurs when the system is maintained at the same temperature throughout an experiment.






37. Another way the second law is stated is that in any spontaneous change - the amount of free energy available ______.






38. *The temperature affects chemical reactions with an increase of ___degrees C above room temperature - causing the reaction rate to double.






39. A solution in which solid solute is in equilibrium with dissolved solute.






40. The process of mixing different orbitals of the same atom to form a new set of equivalent orbitals.






41. *The hypothetical ideal gas obeys exactly the mathematical statement of the ideal gas law. This statement is also called the _____ ___ ____ of an ideal gas because it relates the variables (P - V - n - T) that specify properties of the gas.






42. A chemical reaction formed from the breakdown of a compound into its individual elements or compounds.






43. Heat added to a system and work done by a system are considered _________ quantities.






44. The ________ of an element is a number that measerures the relative strength in which the atoms of the element attract valence electrons in a chemical bond - on a scale of 0-4.






45. Real gases act in a less than ideal way - especially under conditions of increased pressure and/or decreased temperture. Real gas behavior approaches that of ideal gases as the gas pressure becomes very low. The ideal gas is thus considered a _____ _






46. The amount of heat energy required to raise the temperature of a given quantity of a substance one degree celcius.






47. The pressure exerted by each gas in a mixture is called its _____ pressure.






48. The freezing point is always lowered by addition of solute.






49. The molecules in a gas collide with one another - but the collisions are perfectly elastic (they result in no net loss of energy).






50. The solubility of gases in liquid or solid solvents always increases with ________ pressure.







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