Thiele modulus - 2023 BHSU

Question

The internal effectiveness factor times the square of this quantity gives the Weisz-Prater parameter, which is very small when pore diffusion is negligible. For 10 points each:

[10h] Name this quantity, the coefficient of the concentration term in a differential equation that describes a material balance over a spherical pellet.

ANSWER: Thiele modulus

[10e] The Thiele modulus quantifies the effects of diffusion and particle size in these substances, which reduce the activation energy.

ANSWER: catalysts

[10m] For a reaction limited by external diffusion, the reaction rate does not obey Arrhenius kinetics, instead varying with temperature raised to this power. A uni·molecular rate law in which concentration is raised to this power produces a rate constant with units of inverse seconds.

ANSWER: 1 or one [or first power or unity]

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Summary


2023 BHSU @ Berkeley	03/18/2023	Y	3	13.33	100%	33%	0%
2023 BHSU @ Maryland	03/11/2023	Y	3	10.00	100%	0%	0%
2023 BHSU @ Northwestern	02/25/2023	Y	6	11.67	100%	17%	0%
2023 BHSU Online	04/15/2023	Y	4	17.50	100%	75%	0%
2023 BHSU @ Sheffield	04/15/2023	Y	2	10.00	100%	0%	0%
2023 BHSU @ Waterloo	04/15/2023	Y	3	10.00	100%	0%	0%
2023 BHSU @ Yale	04/08/2023	Y	3	13.33	100%	33%	0%

Data


Parth et al.	Cameron et al.	10	0	10
Neg 5! Playing Quizbowl, Liddy Style	Milan et al.	10	0	10
The Vulture's Guide to Buzz	The Passion According to C.H.	10	0	10
Columbia B	UG Championship Players (and Mazin)	10	10	20
[Insert Lawyer Joke Here]	Berkeley A	10	0	10
Stanford A	It's Joever	10	0	10
Berkeley B	Stanford B	10	10	20
Maryland A	Fan-tastic Negs and Where to Find Them	10	0	10
Rutgers Diaspora	Maryland B+	10	0	10
Glass Onyen: A Knives Out Mystery	The Perfection of Wisdom in 8,000 Negs	10	0	10
meet the new weird, same as the old weird	Watching Arthur Delot-Vilain at Chicago Open Made Me Like French People Again	10	0	10
Olmo (Bonus) Bagelry	nats is supposed to mean you all have gone soft	10	0	10
Amartya Senpai Notice Me	Illinois	10	0	10
Mojo Shojo	Brownstein et al.	10	0	10
Chicago A	OSU	10	0	10
WUSTL	Michigan	10	0	10
Northwestern	Epic Games	10	10	20
Chicago B+	Purdue University Fightin' Hadrien Davids	10	0	10
Cornell C++	Cornell B-	10	10	20
Rollin in from Sturgis, The Cheyne Gang	Dr. Christopher Manners, MD – Samarra, Iraq	10	10	20
Houston and friends	What is BH! And you are asking me? BHSU	10	0	10
Hutto Hippos	The Enrique Trastamara Military Academy B	10	10	20
Magisters Ludi	Broken Imperial Nomads	10	0	10
Oxford Hornets	Buzzers Karamazov	10	0	10