What did the scientist say when he discovered two isotopes of Helium?
HeHe.
Search found 10 matches
- Sat Mar 12, 2016 5:41 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3661972
- Mon Feb 29, 2016 6:28 pm
- Forum: *Cycloalkenes
- Topic: HW Question: 1.21
- Replies: 2
- Views: 642
HW Question: 1.21
The answer given states that the name of the cycloalkene is 5-methycyclopenta-1,3-diene. However if we want to number the carbon atoms so that the sum is the smallest possible sum, shouldn't the name be 2-methylcyclopenta-1,3-diene?
- Sat Feb 27, 2016 1:16 pm
- Forum: *Constitutional and Geometric Isomers (cis, Z and trans, E)
- Topic: Constitutional Isomers
- Replies: 2
- Views: 611
Constitutional Isomers
For constitutional isomers of a molecule, can we attach carbons in any way as long as we don't attach one to the ends of a carbon chain?
- Fri Feb 19, 2016 3:48 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3661972
Re: Chemistry Jokes
Q: According to a chemist, why is the world so diverse?
Because it's made up of alkynes of people.
Because it's made up of alkynes of people.
- Tue Feb 09, 2016 9:14 pm
- Forum: Balancing Redox Reactions
- Topic: Midterm 2014 Question 8
- Replies: 1
- Views: 475
Midterm 2014 Question 8
In this question, the half reaction with the greater reduction potential was chosen as the anode. However, isn't the half reaction with the larger reduction potential supposed to be the cathode?
- Fri Feb 05, 2016 3:20 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Calculating Standard Cell Potentials
- Replies: 1
- Views: 435
Calculating Standard Cell Potentials
If we are asked to find the standard cell potential, but both half reactions are given as reduction potentials in the table, how do we know which one to oxidize?
- Fri Jan 29, 2016 4:32 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Quiz 1 Preparation Question (Gibbs Free Energy?)
- Replies: 2
- Views: 2191
Quiz 1 Preparation Question (Gibbs Free Energy?)
There is a question in the Winter 2014 quiz preparation that asks us to determine if a reaction is spontaneous, and a what temperature. Cl2(g) ---> 2Cl(g) The answer states that the reaction is spontaneous at high temperatures. I understand why ΔS would be positive, but why is ΔH positive in this re...
- Fri Jan 22, 2016 4:30 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Calculating Entropy
- Replies: 1
- Views: 479
Calculating Entropy
a) The production of "synthesis gas" a low-grade industrial fuel
CH4(g) + H20(g) ----> CO(g) + 3H2(g)
For part a of this problem (calculate entropy), why can't we use the formula ΔS= -qrev/T? How do I know which ΔS formula to use?
CH4(g) + H20(g) ----> CO(g) + 3H2(g)
For part a of this problem (calculate entropy), why can't we use the formula ΔS= -qrev/T? How do I know which ΔS formula to use?
- Fri Jan 15, 2016 2:06 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: Isothermal Reversible Process
- Replies: 1
- Views: 521
Isothermal Reversible Process
If there are isothermal reversible processes, is there such thing as an irreversible isothermal process as well?
- Fri Jan 08, 2016 10:00 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Standard Enthalpy of a Reaction
- Replies: 1
- Views: 407
Standard Enthalpy of a Reaction
Will there be a situation in which we are told to find the standard enthalpy of a reaction, but one of the products is not in its standard state?
How are we supposed to take the phase change of this product into account?
How are we supposed to take the phase change of this product into account?