Wikipedia
Search Wikipedia:

Latest topics
» Role of Alcohol in general chemistry
Fri Dec 15, 2017 12:17 am by bejoy

» Dendrimers for drug delivery
Mon Dec 11, 2017 1:23 am by bejoy

» Catalysis and its importance in chemical industry
Thu Nov 09, 2017 5:06 am by bejoy

» Cracking: Breaking up larger molecules
Thu Nov 09, 2017 5:05 am by bejoy

» What is Alkylation?
Fri Nov 03, 2017 12:35 am by bejoy

» An Ultimate Guide on Diamond
Thu Nov 02, 2017 2:15 am by bejoy

» Chemistry Running Behind Anger
Mon Oct 30, 2017 12:31 am by bejoy

» The Discovery of Four New Elements in the Periodic Table
Wed Oct 25, 2017 1:23 am by bejoy

» Carbonic Acid: Occurrence, Preparation, Properties and Uses
Mon Oct 23, 2017 1:39 am by bejoy

December 2017
MonTueWedThuFriSatSun
    123
45678910
11121314151617
18192021222324
25262728293031

Calendar Calendar

Free Hit Counter

What is the F-F bond energy?

View previous topic View next topic Go down

What is the F-F bond energy?

Post  pplantblues on Mon Nov 17, 2008 7:19 pm

The reaction of H2 with F2 produces HF with delta H= -269kJ/mol of HF. If the H-H and H-F bond energies are 432 and 565 kJ/mol, respectively, what is the F-F bond energy? kJ/mol
H2(g)+F2(g)-> 2HF(g)
avatar
pplantblues

Posts : 109
Join date : 2008-11-14

View user profile

Back to top Go down

Re: What is the F-F bond energy?

Post  bfrsoccer on Mon Nov 17, 2008 9:47 pm

I think the way to solve this problem is:

By the way the bond energies are defined

deltaH (at standard conditions, 1atm pressure and 25 degrees Celsius, for which the bond energies are normally defined at)=sum of bond energies of reactants-sum of bond energies of products

meaning

-269*2=(432+x)-565*2; (the "*2" parts are there because 2 moles of HF are produced)

x=160kJ/mol is the answer
avatar
bfrsoccer
Administrator

Posts : 61
Join date : 2008-11-09

View user profile

Back to top Go down

Re: What is the F-F bond energy?

Post  pplantblues on Mon Nov 17, 2008 10:40 pm

Thank you for your thorough explanation.
avatar
pplantblues

Posts : 109
Join date : 2008-11-14

View user profile

Back to top Go down

Re: What is the F-F bond energy?

Post  Sponsored content


Sponsored content


Back to top Go down

View previous topic View next topic Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum