A flask is charged with 0.140 mol of A and allowed to react to form B according to the following hypothetical gas-phasereaction.A(g) → B(g)The following data are collected.Os040 S0.07280 s0.025120 s0.014(a) Calculate the number of moles of B at each time in the table.160 s0.0130 - 40 s0.001840 - 80 s0.00062580 - 120 s0.00035120 - 160 mol/s0.000325times (s)molmolx molx molmoles of AX molmol/smol/s0(b) Calculate the average rate of disappearance of A for each 40 s interval, in units of mol/s.mol/s40mol/s801200.140 0.068 0.043 0.0291600.016

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A flask is charged with 0.140 mol of A and allowed to react to form B according to the following hypothetical gas-phase reaction. A(g) → B(g) The following data are collected. times (s) Os 0 moles of A mol 0 40 0.140 0.068 80 (a) Calculate the number of moles of B at each time in the table. 0.043 120 160 0.029 0.016

A flask is charged with 0.140 mol of A and allowed to react to form B according to the following hypothetical gas-phase reaction. A(g) → B(g) The following data are collected. times (s) Os 0 moles of A mol 0 40 0.140 0.068 80 (a) Calculate the number of moles of B at each time in the table. 0.043 120 160 0.029 0.016

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter9: The Gaseous State

Section: Chapter Questions

Problem 75AP

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Question

100%

A flask is charged with 0.140 mol of A and allowed to react to form B according to the following hypothetical gas-phase
reaction.
A(g) → B(g)
The following data are collected.
Os
0
40 S
0.072
80 s
0.025
120 s
0.014
(a) Calculate the number of moles of B at each time in the table.
160 s
0.013
0 - 40 s
0.0018
40 - 80 s
0.000625
80 - 120 s
0.00035
120 - 160 mol/s
0.000325
times (s)
mol
mol
x mol
x mol
moles of A
X mol
mol/s
mol/s
0
(b) Calculate the average rate of disappearance of A for each 40 s interval, in units of mol/s.
mol/s
40
mol/s
80
120
0.140 0.068 0.043 0.029
160
0.016

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