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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 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.






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






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

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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






23. Cells that convert electrical energy into chemical energy.






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






26. 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.






27. *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.






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






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






30. The vapor pressure increases with increasing _____.






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






33. **Proceeding across a period from left to right - the ionization energy _______.






34. *The electrons found in the outermost shell are called _____ electrons. When these electrons are lost or partially lost through sharing - the oxidation state is assigned a positive value for the element. If valence electrons are gained or partially g






35. 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.






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






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






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






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






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






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






42. A catalyst lowers the ______ _____ _____ that must be overcome in order for the reaction to proceed. It merely speeds the approach to equilibrium but does not change Keq at all.

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43. 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






44. An increase in temperature causes the position of equilibrium of an exothermic reaction to be shifted to the _____ - while that of and endothermic reactions is shifted to the _______.

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45. 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






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






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






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






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






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