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






2. In a closed system - when the rates of evaporation and condensation are equal - the system is in ____ ______.






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






4. The relatively weak attractive forces between molecules that are apparent only when the molecules approach one another closely (usually at low temperatures and high pressure).






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






6. *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.






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






8. The amount of heat energy required to raise the temperature 1g of a substance by 1 degree celcius.






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






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






11. 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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12. Rays made up of electrons in basic electron charges.






13. 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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14. The energy required to remove an electron from an isolated atom in its ground state.






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






16. The degree of randomness of a system is represented by a thermodynamic quantity called? the greater the randomness - the greater the _______.






17. In titration - this is the point at which a particular indicator changes color.






18. The vapor pressure increases with increasing _____.






19. A valence theory that permits the geometric arrangement of atoms - or groups of atoms - about some central atom to be determined solely by considering the repulsions between the electron pairs present in the valence shell of the central atom.






20. Metals have electronegativities less than ____






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






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






23. A theory of the hydrogen atom stating that the electron can exist in only certain stable energy levels and that when the electronic state of the atom changes - it must absorb or emit exactly that amound of energy equal to the difference betweent he f






24. 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






25. In a _______ expansion of a gas - the opposing pressure is virtually equal to the pressure exerted by the gas. It is ______ because any slight increase in the external pressure will reverse the process and cause compression to occure.






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






27. The enthalpy changes associated with the reactions that correspond to the formation of a substance from its free elements are called?






28. A chemical reaction where one substance is displacing another. ex: Fe + CuSo4 -> FeSo4 + Cu.






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






30. **As we proceed to the right of the table - ______-forming properties decrease and _____-forming properties increase.






31. The temperature at which a substance's solid and liquid phases are in equilibrium.






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






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






34. When a hydrogen atom is bonded to a highly electronegative atom - it will become partially _____-charged - and will be attracted to neighboring electron pairs. This creates a hydrogen bond. The more polar the molecule - the more effective the hydroge






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






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






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






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






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






40. A state function in which it is the heat content of a substance.






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






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






43. A catalyst affects a chemical reaction by lowering the _____ _____ for both the forward and the reverse reactions equally.






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






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






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






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






49. A principle stating that when a system at equilibrium is disturbed by the application of a stress (change in temperature - pressure - or concentration) it reacts to minimize the stress and attain a new equilibrium position.

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