CHEM 1050 Lecture Notes - Lecture 32: Radioactive Decay, Pre-Exponential Factor, Gibbs Free Energy

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6 Apr 2016

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Formula that you give the concentraion of reactants (or products) at ay ime from the start of the reacion if the iniial concentraion is known. [a] vs. t produces a straight line where the slope is the value of k and will be a negaive value. Rate is dependent on the concentraion of a. A 0 ln [ a t ]= kt+ ln ] lna vs. t produces a straight line where the slope=-k. Radioacive decay is 1st order kineics where decay= final activity initial activity. Units of k m-1s-1 or l/mol(s) 1/[a] vs. t produces a straight line where the slope is k. Or, t1/2=15. 2mins=ln2/k k=4. 56x10-2 ln [ a ] ln [ a 0] Example: a piece of wood has carbon-14 acivity that is 90% of the current carbon acivity. How old is the wood? (t1/2 is 5. 73x103 years) k = ln 2. Calculate k if iniial rate is 10m/s at 25c.

Related Questions

order inter. rate law graph slope

0 [A]=-kt+[A]_0 [A] vs t -k

1 ln[A]=-kt+ln[A]_0 ln[A] vs t-k

2 1/A=kt + 1/[A]_0 1/[A] vs t k

<?xml:namespace prefix = o ns ="urn:schemas-microsoft-com:office:office" /?> Using Integrated Rates Laws

The integrated rate laws for zero-,first-, and second-order reaction may be arranged such that theyresemble the equation for a straight line,.

A. The reactant concentration in a zero-order reaction was9.00

The integrated rate laws for zero-, first-, and second-orderreaction may be arranged such that they resemble the equation for astraight line,y=mx+b.

Order	Integrated Rate Law	Graph	Slope
0	[A]=?kt+[A]0	[A] vs. t	?k
1	ln[A]=?kt+ln[A]0	ln[A] vs. t	?k
2	1[A]= kt+1[A]0	1[A] vs. t	k

The reactant concentration in a zero-order reaction was 6.00

The integrated rate laws for zero-, first-, and second-orderreaction may be arranged such that they resemble the equation for astraight line,y=mx+b.

Order	Integrated Rate Law	Graph	Slope
0	[A]=?kt+[A]0	[A] vs. t	?k
1	ln[A]=?kt+ln[A]0	ln[A] vs. t	?k
2	1[A]= kt+1[A]0	1[A] vs. t	k

The reactant concentration in a zero-order reaction was 6.00

CHEM 1050 Lecture Notes - Lecture 32: Radioactive Decay, Pre-Exponential Factor, Gibbs Free Energy

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