# SG CH 12 - STUDY GUIDE( CH 12) 1) &quot;Instantaneous...

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STUDY GUIDE( CH 12) 1) "Instantaneous rate" is defined as the C) rate of reaction at a particular time. 2) Molecular hydrogen can be made from methane gas by the reaction below. How is the rate of disappearance of CH 4 related to the rate of appearance of H 2 ? - t ] [CH 4 , = ? CH 4 ( g ) + H 2 O ( l ) → CO ( g ) + 3H 2 ( g ) B) 2 1 [H ] 3 t + 3) Methanol can be produced by the following reaction: CO( g ) + 2 H 2 ( g ) → CH 3 OH( g ). How is the rate of disappearance of hydrogen gas related to the rate of appearance of methanol? 2 [H ] t - = ? C) 3 [CH OH] 2 t + 4) The reaction that occurs in a Breathalyzer, a device used to determine the alcohol level in a person's bloodstream, is given below. If the rate of appearance of Cr 2 (SO 4 ) 3 is 1.24 mol/min at a particular moment, what is the rate of disappearance of C 2 H 6 O at that moment? 2K 2 Cr 2 O 7 + 8H 2 SO 4 + 3 C 2 H 6 O 2Cr 2 (SO 4 ) 3 + 2K 2 SO 4 + 11H 2 O C) 1.86 mol/min 5) The decomposition of dinitrogen pentoxide is described by the chemical equation 2 N 2 O 5 ( g ) → 4 NO 2 ( g ) + O 2 ( g ) If the rate of disappearance of N 2 O 5 is equal to 1.40 mol/min at a particular moment, what is the rate of appearance of NO 2 at that moment? C) 2.80 mol/min 6) The decomposition of dinitrogen pentoxide is described by the chemical equation 2 N 2 O 5 ( g ) → 4 NO 2 ( g ) + O 2 ( g ) If the rate of appearance of O 2 is equal to 2.40 mol/min at a particular moment, what is the rate of disappearance of N 2 O 5 at that moment? C) 4.80 mol/min 7) Hydrogen peroxide decomposes to water and oxygen according to the reaction below: 2 H 2 O 2 ( aq ) → 2 H 2 O( l ) + O 2 ( g ) In the presence of large excesses of I - ion, the following set of data is obtained. What is the average rate of disappearance of H 2 O 2 ( aq ) in M/s in the first 45.0 seconds of the reaction if 1.00

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L of H 2 O 2 reacts at 25°C and 1.00 atm pressure? B) 3.63 × 10 -6 M/s 8) Which statement is true for the general rate law: Rate = k [A] m [B] n ? C) The values for the exponents must be determined by experiment. 9) The reaction shown below has the rate law: Rate = k [BrO 3 ][Br ][H + ] 2 . BrO 3 ( aq ) + 5 Br ( aq ) + 6 H + ( aq ) → 3 Br 2 ( aq ) + 3 H 2 O( l ) What is the overall order of reaction? D) fourth
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## This note was uploaded on 10/14/2010 for the course CHEM 1441 taught by Professor None during the Spring '10 term at Aarhus Universitet.

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SG CH 12 - STUDY GUIDE( CH 12) 1) &quot;Instantaneous...

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