16review - 16review Student: _ 1. The compound RX3...

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Page 1 16review Student: ___________________________________________________________________________ 1. t (s) [RX 3 ](mol L -1 ) 0 0.85 2 0.67 6 0.41 8 0.33 12 0.20 14 0.16 The compound RX 3 decomposes according to the equation 3RX 3 R + R 2 X 3 + 3X 2 In an experiment the following data were collected for the decomposition at 100°C. What is the average rate of reaction over the entire experiment? A. 0.011 mol L -1 s -1 B. 0.019 mol L -1 s -1 C. 0.044 mol L -1 s -1 D. 0.049 mol L -1 s -1 E. 0.069 mol L -1 s -1 2. Consider the general reaction 5Br - ( aq ) + BrO 3 - ( aq ) + 6H + ( aq ) 3Br 2 ( aq ) + 3H 2 O( aq ) For this reaction, the rate when expressed as [Br 2 ]/ t is the same as A. - [H 2 O]/ t B. 3 [BrO 3 - ]/ t C. -5 [Br - ]/ t D. -0.6 [Br - ]/ t E. none of these choices is correct
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Page 2 3. Trial Initial [A] Initial [B] Initial Rate (mol/L) (mol/L) (mol/(L·min)) 1 0.200 0.100 6.00 × 10 -2 2 0.100 0.100 1.50 × 10 -2 3 0.200 0.200 1.20 × 10 -1 4 0.300 0.200 2.70 × 10 -1 For the reaction 3A( g ) + 2B( g ) 2C( g ) + 2D( g ) the following data was collected at constant temperature. Determine the correct rate law for this reaction. A. Rate = k [A][B] B. Rate = k [A][B] 2 C. Rate = k [A] 3 [B] 2 D. Rate = k [A] 1.5 [B] E. Rate = k [A] 2 [B] 4. Trial [A] [B] [C] Rate 1 0.225 0.150 0.350 0.0217 2 0.320 0.150 0.350 0.0439 3 0.225 0.250 0.350 0.0362 4 0.225 0.150 0.600 0.01270 For the reaction 2A + B + 2C D + E the following initial rate data was collected at constant temperature. Determine the correct rate law for this reaction. All units are arbitrary. A. Rate = k [A][B][C] B. Rate = k [A] 2 [B][C] C. Rate = k [A] 2 [B][C] -1 D. Rate = k [A][B] 2 [C] -1 E. none of these choices is correct
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5. Sulfuryl chloride, SO 2 Cl 2 ( g ), decomposes at high temperature to form SO 2 ( g ) and Cl 2 ( g ). The rate constant at a certain temperature is 4.68 × 10 -5 s -1 . What is the order of the reaction? A. zero B. first C. second D. third E. More information is needed to determine the order. 6. When the reaction A B + C is studied, a plot 1/[A] t vs. time gives a straight line with a positive slope. What is the order of the reaction? A. zero B. first C. second D. third E. More information is needed to determine the order. 7. Which one of the following sets of units is appropriate for a second-order rate constant? A. s -1 B. mol L -1 s -1 C. L mol -1 s -1 D. mol 2 L -2 s -1 E. L 2 mol -2 s -1 8. A reaction has the following rate law: Rate = k [A][B] 2 In experiment 1, the concentrations of A and B are both 0.10 mol L -1 ; in experiment 2, the concentrations are both 0.30 mol L -1 . If the temperature stays constant, what is the value of the ratio, Rate(2)/Rate(1)? A.
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This note was uploaded on 04/20/2008 for the course CHEM 1300/ taught by Professor Ballester during the Fall '08 term at Nova Southeastern University.

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16review - 16review Student: _ 1. The compound RX3...

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