Sciencemadness Discussion Board » Fundamentals » Beginnings » Pertaining to Frequency Factor Select A Forum Fundamentals   » Chemistry in General   » Organic Chemistry   » Beginnings   » Responsible Practices   » Miscellaneous Engineering and Equipment   » Reagents and Apparatus Acquisition   » Electronics   » Process Engineering   » Materials and Metallurgy Special Topics   » Analytical Chemistry   » Electrochemistry   » Energetic Materials   » Biochemistry   » Radiochemistry   » Computational Models and Techniques Literature and Documentation   » Sciencemadness Wiki   » Prepublication Non-science   » Forum Matters   » Legal and Societal Issues

Author: Subject: Pertaining to Frequency Factor
Kavion123
Harmless

Posts: 23
Registered: 12-1-2015
Location: Tampa, FL
Member Is Offline

Mood: No Mood

Pertaining to Frequency Factor

Remember that old equation k = Ae^(-Ea/RT)?

For some reason when I have both my rate and exponential factor, the frequency factor solved algebraically comes out different from the way the textbook tells me to do it. The textbook says to just draw a straight line from the points I plotted from the data until it hits the y-axis. That point on the Y-axis is my frequency factor. Anyone know why this is? There are no errors in my calculations...
deltaH
Dangerous source of unreferenced speculation

Posts: 1663
Registered: 30-9-2013
Location: South Africa
Member Is Offline

Mood: Heavily protonated

did you linearise by taking natural logs on both sides?

[Edited on 16-1-2015 by deltaH]

j_sum1

Posts: 6229
Registered: 4-10-2014
Location: Unmoved
Member Is Offline

Mood: Organised

No. I don't remember that partcular equation. But I recall many like it. Arrhenius equattions they are called.

Assuming that T is your independent variable, you linearise by plotting log(k) against 1/T.
That should do exactly what you want.

 Sciencemadness Discussion Board » Fundamentals » Beginnings » Pertaining to Frequency Factor Select A Forum Fundamentals   » Chemistry in General   » Organic Chemistry   » Beginnings   » Responsible Practices   » Miscellaneous Engineering and Equipment   » Reagents and Apparatus Acquisition   » Electronics   » Process Engineering   » Materials and Metallurgy Special Topics   » Analytical Chemistry   » Electrochemistry   » Energetic Materials   » Biochemistry   » Radiochemistry   » Computational Models and Techniques Literature and Documentation   » Sciencemadness Wiki   » Prepublication Non-science   » Forum Matters   » Legal and Societal Issues