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






2. When a system at equilibrium is disturbed by adding or removing one of hte substances - all the concentrations will change until a new equilibrium point is reached with the same value of Keq.

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






4. The maximum work derived from any change will be obtained only if the process is carried out in a reversible manner. All real - spontaneous changes are therefore not reversible - and the work that can be derived from an irreversible change is alway l






5. A hypothetical gas would follow Boyles law under all conditions and is called?






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






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






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






9. The change in enthalpy of an endothermic reaction is ________.






10. This law states that the total pressure exerted by a mixture of gases is equal to the sum of the partial pressures of the gases in mixture.






11. 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.






12. The temperature at which the pressure of vapor escaping from the liquid equals atmospheric pressure.






13. The vapor pressure increases with increasing _____.






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






15. A law that states that under conditions of constant temperature and pressure - equal volumes of different gases contain equal numbers of molecules.






16. A law that states that for a given mass of gas - the volume is proportional to the pressure and absolute temperature.






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






18. Electronegativities _______ as you go down a group.






19. If an inert gas is introduced into a reaction vessel containing other gases at equilibrium - it will cause an increase in the ______ _____ within the container - but the increase will not affect the position of equilibrium.

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20. *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.






21. The force with which the electrons flow from the negative electrode to the positive electrode through an external wire is called?






22. Any spontaneous change in a chemical reaction will decrease the amount of free energy toward _______ as the process proceeds towards equilibrium.






23. A chemical reaction where there is an actual exchange of partners to form new compounds. ex: AgNO3 + NaCl -> AgCl + NaNO3.






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






25. Rays made up of positive electrodes in basic electron charges.






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






27. For a solution in which a nonvolatile solute is dissolved in a solvent - the vapor pressure is due only to the vapor of the solvent above the solution. This vapor pressure is given by _______ law.

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






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






30. **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.






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






32. If this law was strictly obeyed - gases would not condense when they are cooled. This means that gases behave in an ideal fashion only at relatively high temperatures and low pressures.






33. This law states that the entropy of any pure - perfect crystal at absolute zero is equal to zero.






34. Liquids with strong attractive forces have ______ boiling points.






35. This process occurs when the system is thermally isolated so that no heat enters or leaves.






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






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






38. In titration - this point occurs when equal numbers of equivalents of acid and base have been reacted. The solution at this point is neutral because neither of the ions of the salt in solution undergoes hydrolysis.






39. In a closed system - when opposing changes are taking place at equal rates - the system is said to be in _____ _______.






40. Electronegativities ________ from left to right in a period.






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






42. A law stating that at a constant temperature - the volume of a gas in inversely proportiona to the pressure.






43. *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.






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






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






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






47. A process that occurs whent eh system is maintained at constant pressure.






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






49. For a cell at concentrations and conditions other than standard - a potential can be calculated using this equation.






50. A chemical reaction formed from the union of its elements.







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