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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. Cells that convert electrical energy into chemical energy.






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






3. Decreasing the concentrations of reactants shifts the equilibrium to the ______ - thus decreasing the concentration of products formed.


4. 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.


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






6. The average kinetic energy of all the molecules collectively is directly proportional to the absolute temperature of the gas. The average kinetic energy of equal numbers of molecules of any gas is the same at the same temperature.






7. The freezing point - boiling point - and vapor pressure of a solution differ from those of the pure solvent by amounts which are directly proportional to the molal concentration of the solute.






8. 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.


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






10. *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.






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






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






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






14. 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.






15. 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.






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






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






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






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






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






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






22. In an exothermic process - energy is released and ^E of reaction is ________.






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






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






25. 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.






26. 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 _____ _






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






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






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






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






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






32. Because of the low intermolecular forces - the melting points are low and evaporation takes place so easily that it may occur at room temperature.






33. _____ bonds are present in molecules containing double or triple bonds.






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






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






36. 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.






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






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






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






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






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






42. 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.


43. The most active nonmetals are found in what corner of the periodic table?






44. The vapor pressure increases with increasing _____.






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






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






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






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






49. 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.






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