calorimetry - 2025 ACF Fall

Packet I: Tossup 20

A “power-compensated” form of this technique uses negative feedback to maintain isothermal sample and reference crucibles. (10[1])A method for determining ligand (10[1])binding affinities (10[1])combines titration (10[2])with this technique. (10[7]-5[1])Peaks (10[1])generated by this (-5[1])technique’s “differential scanning” (10[3]-5[2])type (10[4])indicate (10[3]-5[1])phase (10[3])transitions. (-5[10])The equation (10[1]-5[1])[read slowly] “q (-5[1])equals (-5[1])C-sub-V (10[3]-5[1])times (10[2])delta (10[1])T” (10[1])can (10[1])be used with this technique (10[4])to (10[1])determine (10[2])enthalpy change. (10[8])This technique (10[1])can be performed (10[2])with two (10[1])nested (10[2])Styrofoam (10[3])cups (10[16]-5[1])to determine (10[6])whether (10[2])a process (10[5])is (10[2])exothermic (10[6]-5[1])or endothermic. (10[1])For (10[1])10 points, identify this technique whose “bomb” (10[1])type (10[2])can be used to (10[1])measure (10[1])the heat (10[1])flows (10[1])associated with a chemical reaction. (10[1])■END■ (10[6]0[3])

ANSWER: calorimetry [accept bomb calorimetry or differential scanning calorimetry or isothermal titration calorimetry or power-compensated calorimetry; accept answers with word forms like calorimeters; prompt on DSC; prompt on ITC]

<Editors, Chemistry> | Packet I

= Average correct buzzpoint

Back to tossups

Buzzes

Player	Team	Opponent	Buzzpoint	Value
Nick Machin	UCLA A	USC A	15	10
Ilyas Choukri	Virginia Tech A	Virginia Tech B	20	10
Aaryan Sumesh	Berkeley Archer Queen	Stanford B	22	10
Arjun Saulnier	CWRU C	Ohio State C	24	10
Surya Dinesh	MIT A	Boston College A	24	10
Kevin Hendargo	UCSD A	UC Santa Barbara	27	10
Denali Tran-Le	McGill B	McGill A	27	10
Christian Humeniuk	McMaster A	Toronto B	27	10
Snehan Saroch	Louisville A	CWRU B	27	10
Ethan Ma	Illinois Blue	Illinois Champaign	27	10
Camden Walker	WashU Grolars	Purdue D	27	-5
Jeremy Scurlock	Chipola College	Alabama A	27	10
Darren Kellis	Vanderbilt A	South Carolina A	27	10
George Matsumura	Washington Chum	British Columbia C	28	10
Advai Srinivasan	UC Irvine	UCLA F	31	-5
Jeremy Kim	Toronto F	Queen's A	34	-5
Jesse Mindel	NCSU A	UNC A	34	10
Fern Fang	VCU A	UNC B	34	10
Suyog Vibhuti	Washington Steelhead	Alberta A	34	-5
David Xilbille	Georgia Tech C	Clemson A	34	10
Alden Thompson	Carleton A	Carleton B	35	10
Malcolm Meyn	McGill C	Ottawa B	35	10
Matthew Bucek	George Mason A	Maryland A	35	10
Amelia Rees	Durham A	Edinburgh A	35	10
Hansen Jin	Berkeley Skeleton King	UCSC	36	10
Sai Subramanian	CWRU A	Michigan A	36	10
Matthew Westley	Purdue A	Purdue C	36	10
Joanna Xiao	Georgia Tech B	Georgia Tech F	36	-5
Juan Landaeta	Florida State A	South Florida A	37	10
Jason Lee	Rutgers A	Maryland C	37	10
Beckett Pursey	Purdue B	Iowa B	37	10
Joshua Lam	Ohio State B	CWRU D	38	-5
Jacob Goodson	Ohio State A	Michigan State B	38	-5
Nathan Woolery	Louisville C	Ohio State D	38	-5
James Haddix	Washington State	Arizona State A	38	-5
Daniel Lu	Washington Pink	Washington Sockeye	38	-5
Cassidy McIntyre	Rose State	Kansas State B	38	-5
Nolan Travers	Tulsa A	Nebraska A	38	-5
Brayden Zhang	Vanderbilt B	Vanderbilt C	38	-5
Charlotte Nicholas	Durham B	Sheffield A	38	-5
Judah Solomon	Imperial D	Cambridge E	38	-5
Dustin Sanders	Chicago B	Illinois Urbana	40	10
Alex Forman	Cornell D	RIT B	40	-5
Andrew Park	Harvard	Williams C	41	-5
Bonham Buchannon	Louisville D	Kentucky	42	-5
Miles Phillips	Florida Tech B	ERAU Daytona A	43	10
Jason Thieu	Michigan State A	Michigan B	43	-5
Alexandra Knight	Liberty B	JMU B	43	10
Salil Jain	Williams B	Brandeis Mozart	43	10
James Xiao	Toronto A	Toronto C	44	10
Michael Shipman	Cambridge D	Bristol	44	10
Andrew Heller	Georgia Tech E	Emory A	45	10
Drew Wetterlind	Iowa State	Macalester	46	10
Martin Brandenburg	Georgia A	Tennessee Tech	47	10
Dawson Teu	Waterloo A	Toronto D	52	10
Nina Chen	Waterloo B	Waterloo C	52	10
Liam Buck	St. Thomas	Wisconsin A	52	10
Musa Ahmed	Edinburgh C	Durham C	52	10
Sean Gao	Toronto E	McMaster B	53	10
Taman Truong	USC B	UCLA E	54	10
Lee Huynh	Guelph A	Toronto G	54	10
Vijay Hans	Berkeley Boss Bandit	Berkeley Mighty Miner	56	10
Maya Hunt	Michigan State C	WVU A	56	10
Kyle Hart	MIT B	Brandeis Beethoven	56	10
Mitchell Hackett	Central Oklahoma A	Nebraska B	56	10
Bharath Ram	Georgia Tech A	Tennessee A	56	10
Alex Miller	Edinburgh B	Durham D	56	10
Advaith Jagannath	Cambridge C	Imperial B	56	10
Derek Li	Cornell A	ESF	56	10
Ishan Pachauri	UCLA C	UCSD B	58	10
Francis Dinh	Illinois Canada	Indiana A	61	10
Vikram Rajmohan	Amherst A	Brown A	61	10
Charlie Rickards	Ottawa C	McGill E	63	10
Sicheng Jiang	Toronto H	Brock A	64	10
Elizabeth Megson	Tulsa B	Harding	64	10
Jackson Crickard	Claremont B	Claremont A	65	10
Tristan Scarlett	Ottawa D	Ottawa A	65	10
Leighton Karpinia	Florida Tech A	UCF A	65	10
Terrence Han	UCLA B	UCLA D	66	10
Thomas Brittain	McMaster C	Toronto I	66	10
Nishad Joshi	Kentucky	Louisville D	66	10
Joseph Strom	Louisville B	Michigan C	66	10
Samuel Li	William & Mary A	Virginia A	66	10
Sam Hewitt	WashU Grizzlers	Indiana B	66	10
Ayaan Jajodia	Dartmouth B	Brown B	66	10
Brendan Liaw	British Columbia A	Texas	66	10
Annabelle Koopmans	Washington Atlantic	British Columbia B	66	-5
Graham Dirks	Kansas State A	Central Oklahoma B	66	10
Brandon Hunt	Auburn B	Auburn A	66	10
Asheton Wilbanks	Clemson B	Clemson C	66	10
Sonali Srikanth	Georgia Tech D	Montevallo	66	10
James Carrick-Lawson	Southampton	Birmingham	66	10
Oliver West	Cambridge B	Cardiff	66	10
Will Hoover	RIT A	Cornell C	66	10
Ariyan Miah	Binghamton B	Rochester	66	10
Brendan Bridle	Queen's A	Toronto F	68	10
Austin Tran	Rose-Hulman A	William Woods University A	68	10
Luke Sauer	Michigan Tech	Wisconsin B	68	10
Keira Flenniken	Oklahoma	Murray State College A	68	10
Towery McNeil	Mississippi State A	Auburn C	68	10
Juliette Flatau	Imperial A	Warwick	68	10
Ritisha Dey	Stanford A	Berkeley Little Prince	69	10
Akhil Upadrasta	Ohio State D	Louisville C	69	10
Julia Marder	Pittsburgh	Michigan D	71	10
Zoe Brennan	Virginia Tech C	UNC C	71	10
Grace Early	Iowa A	Chicago A	71	10
Yvonne Pan	Amherst B	Tufts C	71	10
Nolan King	Nebraska C	Murray State College B	71	10
Pratham Bhanushali	WVU B	Michigan State D	72	10
Rae Meyers	Arizona State A	Washington State	72	10
Johanna Bryant	Liberty A	Duke A	73	10
David Ciardella	Vermont B	Dartmouth A	73	10
Judah Friedman	UConn A	Tufts B	73	10
Moses Dong	Georgia Tech F	Georgia Tech B	73	10
Canaan Martin	Tennessee B	Sewanne	73	-5
Ben Gardberg	Cornell B	Binghamton C	73	10
Hayley Morris	RIT B	Cornell D	73	10
Nathaniel Martin	Brandeis Bach	Boston University A	75	10
Kamil Boehm	Cambridge A	Oxford	76	10
Siheon Lee	Imperial C	LSE	83	10
Cole Hammans	Nebraska A	Tulsa A	84	10
Jaie Somaia	Sheffield A	Durham B	84	10
Luke Houtz	Arizona State B	Washington Coho	88	10
Benjamin Turner	York	Edinburgh D	89	10
Anna Liao	Michigan B	Michigan State A	91	10
Benjamin Silversten	William & Mary C	William & Mary B	92	10
Daniel Luebs	Michigan State B	Ohio State A	97	10
Rohan Soni	UCLA F	UC Irvine	98	0
Matthew Stall	CWRU D	Ohio State B	98	10
Walter Carson	NCSU B	Liberty C	98	0
Justine Hopkins	Liberty C	NCSU B	98	0
James Windle	Purdue D	WashU Grolars	98	10
Ben Stras	Wisconsin C	Minnesota	98	10
Anne Fjeld	Alberta A	Washington Steelhead	98	10
Simarya Ahuja	Washington Sockeye	Washington Pink	98	10
Ahmed Azhari	Cambridge E	Imperial D	98	10

Summary

Tournament	Edition	Match	Heard	Conv. %	Neg %	Avg. Buzz
Northern California	Main	✓	4	100%	0%	45.75
Southern California	Main	✓	7	86%	14%	47.50
Eastern Canada (1)	Main	✓	5	100%	0%	45.00
Eastern Canada (2)	Main	✓	9	100%	11%	53.33
Florida	Main	✓	3	100%	0%	48.33
Great Lakes	Main	✓	12	100%	42%	64.42
Lower Mid-Atlantic	Main	✓	9	89%	0%	54.13
Upper Mid-Atlantic	Main	✓	2	100%	0%	36.00
Midwest	Main	✓	9	100%	11%	56.00
North	Main	✓	4	100%	0%	66.00
Northeast	Main	✓	10	90%	10%	60.22
Pacific	Main	✓	7	86%	57%	75.00
South Central	Main	✓	7	86%	29%	68.17
Southeast	Main	✓	13	85%	23%	52.27
Upstate NY	Main	✓	5	100%	20%	66.80
UK (North)	UK	✓	5	100%	20%	63.20
UK (South)	UK	✓	8	100%	13%	69.63