Advanced Placement Examination in Chemistry
The Advanced Placement Examination in Chemistry
Part II - Free Response Questions & Answers 1970 to 2007
Thermodynamics
Teachers may reproduce this publication, in whole or in part, in limited print quantities for non-commercial, face-to-face teaching purposes. This permission does not apply to any third-party copyrights contained within this publication.
Advanced Placement Examination in Chemistry. Questions copyright© 1970-2007 by the College Entrance Examination Board, Princeton, NJ 08541. Reprinted with permission. All rights reserved. apcentral.collegeboard.com. This material may not be mass distributed, electronically or otherwise. This publication and any copies made from it may not be resold.
Portions copyright © 1993-2007 by Unlimited Potential, Framingham, MA 01701-2619.
Compiled for the Macintosh and PC by:
Harvey Gendreau (ret.)
Framingham High School
Framingham, MA 01701-4195 419-735-4782 (fax) 508-877-8723 (home office) www.apchemistry.com apchemtchr@aol.com hgendreau@rcn.com Requests for copies of these questions and answers as e-mail attachments for either the Macintosh or the PC (MS-Office files) should be sent to: apchemtchr@aol.com Please include your name, school, school phone, name of principal/headmaster and school website address. Don’t forget to include the file format you want, Mac or PC.
1970
Consider the first ionization of sulfurous acid:
H2SO3(aq) ( H+(aq) + HSO3-(aq)
Certain related thermodynamic data are provided below: H2SO3(aq) H+(aq) HSO3-(aq) ----------------- ---------- ------------------
Hf( kcal/mole -145.5 0 -151.9
S° cal/mole K 56 0 26
(a) Calculate the value of ΔG° at 25°C for the ionization reaction.
(b) Calculate the value of K at 25°C for the ionization reaction.
(c) Account for the signs of ΔS° and ΔH° for the ionization reaction in terms of
Part II - Free Response Questions & Answers 1970 to 2007
Thermodynamics
Teachers may reproduce this publication, in whole or in part, in limited print quantities for non-commercial, face-to-face teaching purposes. This permission does not apply to any third-party copyrights contained within this publication.
Advanced Placement Examination in Chemistry. Questions copyright© 1970-2007 by the College Entrance Examination Board, Princeton, NJ 08541. Reprinted with permission. All rights reserved. apcentral.collegeboard.com. This material may not be mass distributed, electronically or otherwise. This publication and any copies made from it may not be resold.
Portions copyright © 1993-2007 by Unlimited Potential, Framingham, MA 01701-2619.
Compiled for the Macintosh and PC by:
Harvey Gendreau (ret.)
Framingham High School
Framingham, MA 01701-4195 419-735-4782 (fax) 508-877-8723 (home office) www.apchemistry.com apchemtchr@aol.com hgendreau@rcn.com Requests for copies of these questions and answers as e-mail attachments for either the Macintosh or the PC (MS-Office files) should be sent to: apchemtchr@aol.com Please include your name, school, school phone, name of principal/headmaster and school website address. Don’t forget to include the file format you want, Mac or PC.
1970
Consider the first ionization of sulfurous acid:
H2SO3(aq) ( H+(aq) + HSO3-(aq)
Certain related thermodynamic data are provided below: H2SO3(aq) H+(aq) HSO3-(aq) ----------------- ---------- ------------------
Hf( kcal/mole -145.5 0 -151.9
S° cal/mole K 56 0 26
(a) Calculate the value of ΔG° at 25°C for the ionization reaction.
(b) Calculate the value of K at 25°C for the ionization reaction.
(c) Account for the signs of ΔS° and ΔH° for the ionization reaction in terms of