Docsity
Docsity

Prepare for your exams
Prepare for your exams

Study with the several resources on Docsity


Earn points to download
Earn points to download

Earn points by helping other students or get them with a premium plan


Guidelines and tips
Guidelines and tips

5 Problems on Physical Chemistry - Assignment 5 | CHEM 113C, Study notes of Physical Chemistry

HW #5 Material Type: Notes; Class: PHYSICAL CHEMISTRY; Subject: Chemistry and Biochemistry; University: University of California - Santa Barbara; Term: Spring 2012;

Typology: Study notes

2011/2012

Uploaded on 07/18/2012

jennybarahona
jennybarahona 🇺🇸

4.5

(2)

10 documents

1 / 5

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
Chem. 113C Homework Assignment #5
Solutions
Problem 1
Consider the schematic reaction
a) If the reaction is one-half order with respect to [A], what is the integrated rate law
expression for this reaction?
b) What plot would you construct to determine the rate constant k for the reaction?
c) What would be the half-life for this reaction? Will it depend on initial concentration of
the reactant?
pf3
pf4
pf5

Partial preview of the text

Download 5 Problems on Physical Chemistry - Assignment 5 | CHEM 113C and more Study notes Physical Chemistry in PDF only on Docsity!

Chem. 113C Homework Assignment # 5 Solutions Problem 1 Consider the schematic reaction a) If the reaction is one-half order with respect to [ A ], what is the integrated rate law expression for this reaction? b) What plot would you construct to determine the rate constant k for the reaction? c) What would be the half-life for this reaction? Will it depend on initial concentration of the reactant?

The half-life of 238 U is 4.5 x 10 9 years. How many disintegrations occur in 1 minute for a 10 - mg sample of this element?

For a type II second-order reaction, the reaction is 60% complete in 60 seconds when [ A ] 0 = 0.1 M and [ B ] 0 = 0.5 M. a) What is the rate constant for this reaction? b) Will the time for the reaction to reach 60% completion change if the initial reactant concentrations are decreased by a factor of two?

An experiment is performed on the generalized parallel reaction depicted in the lecture notes. Two things are determined: (1) The yield for B at a given temperature is found to be 0.3 and (2) the rate constants are described well by an Arrhenius expression with the activation to B and C formation being 27 and 34 kJ mol– 1 , respectively, and with identical preexponential factors. Demonstrate that these two statements are inconsistent with each other.