Preparing for your ACS examination in general chemistry
Preparing for your ACS examination in general chemistry
98th Edition
ISBN: 9780970804204
Author: Lucy T Eubanks
Publisher: ACS DIVCHED EXAMINATIONS INST.
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Chapter DY, Problem 7PQ
Interpretation Introduction

Interpretation:

The half-life for the first order conversion of cyclobutane to ethylene, C4H8(g)2C2H4(g) is 22.7s at a particular temperature.  Then the time in seconds that are needed for the partial pressure of cyclobutane to decrease from 100 mm Hg to 10 mm Hg has to be calculated.

Concept Introduction:

Half-life is given by the equation,

    t1/2=0.693kk-rate constant

Equation relating the rate constant and partial pressure is:

    ln[P]t=-kt+ln[P]o[P]t=partial pressure at time 't' [P]o=initial pressure

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