Search found 10 matches

by Steph S 2F
Sat Mar 12, 2016 5:41 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7726
Views: 1045914

Re: Chemistry Jokes

What did the scientist say when he discovered two isotopes of Helium?

HeHe.
by Steph S 2F
Mon Feb 29, 2016 6:28 pm
Forum: *Cycloalkenes
Topic: HW Question: 1.21
Replies: 2
Views: 280

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?
by Steph S 2F
Sat Feb 27, 2016 1:16 pm
Forum: *Constitutional and Geometric Isomers (cis, Z and trans, E)
Topic: Constitutional Isomers
Replies: 2
Views: 339

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?
by Steph S 2F
Fri Feb 19, 2016 3:48 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7726
Views: 1045914

Re: Chemistry Jokes

Q: According to a chemist, why is the world so diverse?

Because it's made up of alkynes of people.
by Steph S 2F
Tue Feb 09, 2016 9:14 pm
Forum: Balancing Redox Reactions
Topic: Midterm 2014 Question 8
Replies: 1
Views: 283

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?
by Steph S 2F
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: 202

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?
by Steph S 2F
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: 599

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...
by Steph S 2F
Fri Jan 22, 2016 4:30 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Calculating Entropy
Replies: 1
Views: 302

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?
by Steph S 2F
Fri Jan 15, 2016 2:06 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Isothermal Reversible Process
Replies: 1
Views: 293

Isothermal Reversible Process

If there are isothermal reversible processes, is there such thing as an irreversible isothermal process as well?
by Steph S 2F
Fri Jan 08, 2016 10:00 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Standard Enthalpy of a Reaction
Replies: 1
Views: 231

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?

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