methods
Moderators: Chem_Mod, Chem_Admin
-
- Posts: 72
- Joined: Fri Sep 28, 2018 12:15 am
-
- Posts: 74
- Joined: Fri Sep 28, 2018 12:28 am
-
- Posts: 53
- Joined: Fri Sep 28, 2018 12:28 am
-
- Posts: 62
- Joined: Fri Sep 28, 2018 12:28 am
Re: methods
aaronharouni wrote:How do you know which method to use when dealing with bond enthalpies?
draw the lewis structures
-
- Posts: 39
- Joined: Fri Sep 28, 2018 12:21 am
Re: methods
You can also cross out bonds if both the products and reactants both have the same number!
-
- Posts: 96
- Joined: Fri Apr 06, 2018 11:05 am
- Been upvoted: 1 time
Re: methods
eden tefera 2B wrote:You can also cross out bonds if both the products and reactants both have the same number!
Would you be able to explain what you mean with an example? This seems like a helpful tip, but I'm not sure how to do this in practice. Thank you!
-
- Posts: 52
- Joined: Fri Feb 23, 2018 3:02 am
Re: methods
Eruchi Okpara 2E wrote:How do you know which bonds need to be broken?
if you draw out the lewis structures you will be able to cross out any new bonds formed or any bonds that were broken. This method will make it easier to go about these problems involving bond enthalpies
-
- Posts: 59
- Joined: Fri Sep 28, 2018 12:27 am
Re: methods
If you are given (or took to look up) the bond enthalpies, you then just have to use the equation that someone put above.
-
- Posts: 60
- Joined: Fri Sep 28, 2018 12:26 am
Re: methods
There are three main methods.
1. Standard Enthalpy of Formation, given by the enthalpy of formation of each reactant and product
2. Hess's Law, given by several equations that need to be manipulated to add up to the given equation
3. Bond Enthalpy, given by the enthalpies of each bond in the reactant and product molecules
1. Standard Enthalpy of Formation, given by the enthalpy of formation of each reactant and product
2. Hess's Law, given by several equations that need to be manipulated to add up to the given equation
3. Bond Enthalpy, given by the enthalpies of each bond in the reactant and product molecules
Who is online
Users browsing this forum: No registered users and 9 guests