Department of Energy Argonne National Laboratory Office of Science NEWTON's Homepage NEWTON's Homepage
NEWTON, Ask A Scientist!
NEWTON Home Page NEWTON Teachers Visit Our Archives Ask A Question How To Ask A Question Question of the Week Our Expert Scientists Volunteer at NEWTON! Frequently Asked Questions Referencing NEWTON About NEWTON About Ask A Scientist Education At Argonne ATP Phosphate Energy
Name: R. M.
Status: Educator
Grade:  9-12
Location: N/A
Country: United States
Date: March 2005

I am trying to find out how may Joules (kjoul.) are bound up in the high energy phosphate bond of ATP? In other words when ADP is converted to ATP how much energy is in that new single covalent bond?

There are several interesting posts regarding the energy stored by ATP in the NEWTON AAS Molecular Biology Archive

( ).

The most directly relevant to your inquiry is a fairly old answer to a question on ATP Energy, in which Dr. Peter Faletra indicates that "the amount of energy released when

[ATP-->ADP+ PHO4~substrate] is about -30.5 kilojoules.mole-1"

( ).

My apologies for the delay in responding & I hope that this info. is still helpful,

Jeff Buzby, Ph.D.
CHOC Research Institute

Click here to return to the Molecular Biology Archives

NEWTON is an electronic community for Science, Math, and Computer Science K-12 Educators, sponsored and operated by Argonne National Laboratory's Educational Programs, Andrew Skipor, Ph.D., Head of Educational Programs.

For assistance with NEWTON contact a System Operator (, or at Argonne's Educational Programs

Educational Programs
Building 360
9700 S. Cass Ave.
Argonne, Illinois
60439-4845, USA
Update: June 2012
Weclome To Newton

Argonne National Laboratory