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






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






3. 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.






4. The most active metals are found in what corner of the periodic table?






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






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






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






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






10. Electronegativities _______ as you go down a group.






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






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






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






14. 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 _____ _






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






16. 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.






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






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






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






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






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






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






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






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






26. For most substances - when a hot concentrated solution is cooled - the excess solid ________. This is useful in purification of the solute.






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






28. Increase in the concentrations of reactants shifts the equilibrium to the ______ - thus increasing the amount of products formed.

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






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






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






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






33. 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.






34. *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.






35. The ______ of the system is some particular set of conditions of pressure - temperature - number of moles of each component - and their physical form (ex: gas - liquid - solid or crystalline form).






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






37. The law stating that change in internal energy is equal to the difference between the energy supplied toi the system as heat and the energy removed from the system as work performed on the surroundings.






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






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






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






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






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






44. *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.






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






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






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






48. 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.






49. 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






50. **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.






Can you answer 50 questions in 15 minutes?



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