Search found 10 matches
Search found 10 matches • Page 1 of 1
- Mon Feb 27, 2017 2:06 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 7774
- Views: 1073670
A group of organic molecules were having a party, when a group of robbers broke into the room and stole all of the guest's joules. A tall, strong man, armed with a machine gun came into the room and killed the robbers one by one. The guests were very grateful to this man, and they wanted to know who...
- Thu Jan 12, 2017 8:26 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Cha. 8 HW Problem #57
- Replies: 7
- Views: 729
We have to combine the 3 reactions instead of simply plugging the numbers because they give us the the value of the combustion reactions, not the values of the standard enthalpy of formation. Also, if we were to plug in the values we would get positive 312 which is incorrect.