Search found 10 matches

by Rachel_Bressler_3I
Sun Mar 19, 2017 12:59 am
Forum: *Cycloalkenes
Topic: Benzene vs. Phenol
Replies: 1
Views: 483

Re: Benzene vs. Phenol

phenol is benzene with an -oh group attached to it, but I don't think we have to know phenol for the final.
by Rachel_Bressler_3I
Sun Mar 12, 2017 9:33 pm
Forum: *Constitutional and Geometric Isomers (cis, Z and trans, E)
Topic: cis-trans
Replies: 2
Views: 267

Re: cis-trans

first compare the molar mass of the carbon molecules parallel to each other. If both of the highest priority are on the same side, it is cis, and if they are on opposite sides are trans.
by Rachel_Bressler_3I
Mon Feb 20, 2017 11:21 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7610
Views: 1020419

Re: Post All Chemistry Jokes Here

How many atoms in a guacamole?
Avocado's number.
by Rachel_Bressler_3I
Sun Feb 12, 2017 8:09 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Bond Enthalpy w/ Diagram
Replies: 2
Views: 371

Re: Bond Enthalpy w/ Diagram

bonds in reactants are broken and bonds in products are formed; count the different types of bonds in both the reactants and products, and if they show up on both sides then you don't have to account for them because they cancel out.
by Rachel_Bressler_3I
Sun Feb 05, 2017 5:29 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7610
Views: 1020419

Re: Post All Chemistry Jokes Here

A small piece of ice which lived in a test tube fell in love with a Bunsen burner and said "Bunsen! My flame! I melt whenever I see you". The Bunsen burner replied :"It's just a phase you're going through".
by Rachel_Bressler_3I
Sun Jan 29, 2017 5:08 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: 9.35
Replies: 1
Views: 276

9.35

Why is the entropy of system A greater than that of system C if system C has a diatomic gas and system A has a monatomic gas?
by Rachel_Bressler_3I
Sun Jan 22, 2017 7:40 pm
Forum: Phase Changes & Related Calculations
Topic: Reversible vs. irreversible processes
Replies: 2
Views: 271

Re: Reversible vs. irreversible processes

According to the second law of thermodynamics, any process that would reduce the entropy of an isolated system is impossible. If a reaction takes place in the forward direction and the entropy increases, then for the reverse process the entropy would decrease, which is impossible, so the forward rea...
by Rachel_Bressler_3I
Sun Jan 15, 2017 4:40 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Homework 8.75
Replies: 1
Views: 247

Re: Homework 8.75

-270 kJ/mol refers to a single N-F bond, not NF[3] as a whole. Therefore, since there are 3 N-F bonds in NF[3] and there are 2 moles of NF[3] being formed, there would be 6 moles of N-F bonds.

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