particle collisions - 2024 PACE NSC

Question

Counterintuitively, a first-order Lindemann (“LIN-de-min”) mechanism requires one of these events to activate “A” into “A-star.” The rate of these events, symbolized Z, is the ratio between the frequency and steric factors (20[2])and is approximated (20[2])as (20[2])[read slowly] “sigma, (20[2])times root eight pi k B T, over reduced mass.” (20[1])Molecular chaos (20[1])assumes velocity (20[1])is uncorrelated in the interval between these events, (20[4])during which (20[1])a molecule (20[1])moves (20[2])one (20[2])(*) mean free path. (10[1])The Arrhenius (10[1])pre-exponential (10[2])factor equals the frequency of these events (10[1])times the (10[1])probability (10[1])they occur at proper (10[1])orientation. (10[2])The ideal (10[1])gas law can be derived by using (10[1])the (10[1])force of these events to define (10[1])pressure. For (10[1])10 points, kinetic molecular theory assumes what events are always elastic? ■END■

ANSWER: particle collisions [or collision theory; accept any synonymous answers indicating molecules colliding or hitting each other or the walls of their containers; prompt on interactions between particles; reject “reactions”]

= Average correct buzz position

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Buzzes

Player	Team	Opponent	Buzz Position	Value
Tate Osborne	Alabama Cyber Tech	Beavercreek	30	20
Alex Xu	Canyon Crest	Innovation Academy A	30	20
Rohan Kher	Barrington	Johns Creek A	33	20
Ibrahim Mohammad	Chattahoochee	West Point	33	20
Ryan Smith	Downingtown STEM	DuPage County AT	34	20
Ali Hamzeh	Kinkaid	Richard Montgomery A	34	20
Jingyi Wu	Stevenson A	Bloomington	37	20
Sohum Sukhatankar	St. Mark's	Winston Churchill A	37	20
Brighton Risch	Great Valley	Richard Montgomery B	47	20
Anvith Vanukuri	William Fremd	Okemos	49	20
Aarushi Kanigicherla	Thomas Jefferson C	Mexico	51	20
Vidur Kothur	Lindbergh	Fairfield County AT	59	20
Matthew Kohn	Hunter A	Hastings	59	20
Harish Lolla	Livingston B	Johns Creek B	59	20
Alec Riso	Thomas Jefferson B	Walter Payton A	59	20
Timothy Porter	Maggie Walker A	Hoover A	61	20
Jacob Barta	Detroit Catholic Central A	Winston Churchill B	63	20
Sam Cohen	McLean A	Detroit Catholic Central C	64	20
Jonathan Ouyang	University Lab	Livingston A	64	20
Ben Hellman	Georgetown Day	Northmont A	65	20
Deven Hagen	Thomas Jefferson A	Thomas Jefferson D	65	20
Max Chen	Strake Jesuit	Belmont	68	10
James Grey	Freeman	Owensboro	70	10
Wyatt Johnson	Solon	Hunter B	71	10
Kevin Adler	Northmont B	Lightridge	71	10
Jonathan Tao	Stevenson B	Choate Rosemary Hall	78	10
Pranav Srambikkal	Lambert	Heights	80	10
Keith De La Rosa	Hoover B	Durham AT	81	10
Joshua Studee	Walter Payton B	Norfolk Academic Guild	85	10
Devesh Kumar	Maggie Walker B	St. Thomas	86	10
Teddy Berente	Saint Joseph	St. Xavier	86	10
Will Treadway	Cincinnati Hills	Elkhorn North	88	10
Katie Watson	Maggie Walker C	James W. Robinson	95	10
Philip Calabrese	Detroit Catholic Central B	Innovation Academy B	96	10
Keerthana Krishnan	Seven Lakes	McLean B	102	10
Danial Pitafi	Carbondale	Carl Sandburg	104	10

Summary

Tournament	Edition	Exact Match?	TUH	Conv. %	Power %	Neg %	Average Buzz
2024 PACE NSC	06/08/2024	Y	36	100%	58%	0%	63.72