MYTUTOR SUBJECT ANSWERS

1188 views

How do I calculate the Gibbs free energy change for a reaction when given the entropy change, enthalpy change and the reaction conditions>

deltaG= Gibbs free energy 

deltaG=deltaH - TdeltaS 

If deltaH= 150 kJ/mol and deltaS=2.1 J/mol we must first convert the deltaS into kJ/mol, this is done by multiplying by 10-3 .

So deltaS= 2.1 x 10-3 kJ/mol. If the reaction is done at 25 degrees celcius, we must convert it to Kelvin, by adding 273. This gives 298 K. 

 

So the value of deltaG can be worked out:

 

deltaG= (150 kJ/mol) - (298) x( 2.1x 10-3

deltaG= 149. 4 kJ/mol 

 

Archit M. GCSE Chemistry tutor, A Level Chemistry tutor, A Level Exte...

2 years ago

Answered by Archit, an A Level Chemistry tutor with MyTutor


Still stuck? Get one-to-one help from a personally interviewed subject specialist

164 SUBJECT SPECIALISTS

£20 /hr

Rhiannon M.

Degree: Environmental Geoscience (Bachelors) - Durham University

Subjects offered:Chemistry, Maths+ 2 more

Chemistry
Maths
Geology
Geography

“Third year Earth Sciences student at Durham; specialise in geochemistry and tutor in Earth sciences, Chemistry and Maths”

Trusted by schools

|  4 completed tutorials

£26 /hr

Steven A.

Degree: Bioscience (Masters) - Durham University

Subjects offered:Chemistry, Science+ 5 more

Chemistry
Science
Maths
Human Biology
English
-Personal Statements-

“Hi! I'm Steven and studying Biomedical Science at Durham. I'm friendly, approachable, and passionate for my subjects.”

£22 /hr

Chaitya D.

Degree: Medicine A100 (Bachelors) - Liverpool University

Subjects offered:Chemistry, Science+ 6 more

Chemistry
Science
Physics
Maths
Biology
.UKCAT.
-Personal Statements-
-Medical School Preparation-

“Hi, I'm Chai and I'm a fifth year medical student that is passionate about helping students achieve the best of their potential!”

About the author

Archit M. GCSE Chemistry tutor, A Level Chemistry tutor, A Level Exte...

Archit M.

Currently unavailable: for regular students

Degree: Chemistry (Masters) - Manchester University

Subjects offered:Chemistry, Maths+ 1 more

Chemistry
Maths
Extended Project Qualification

“4th Year Chemist. University of Manchester. Generally knowledgeable about Science. I also like working on improving personal statements, CVs and helping with Interview practice- I've had plenty! ”

You may also like...

Other A Level Chemistry questions

Why do ionisation energies typically increase upon going across a period yet decrease upon going down a group?

Why do ionic compounds like NaCl conduct electricity when dissolved but not when they’re solid, whereas metals conduct electricity when they’re solid?

How do i tell if a substance has been Oxidised or Reduced?

Why does a salt not conduct electricity in its solid state?

View A Level Chemistry tutors

We use cookies to improve your site experience. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok