## Search found 58 matches

Tue Mar 13, 2018 8:30 pm
Forum: *Free Energy of Activation vs Activation Energy
Topic: Standard Gibbs Free Energy of Activation
Replies: 2
Views: 923

### Re: Standard Gibbs Free Energy of Activation

because you need energy for the reaction to happen
Tue Mar 13, 2018 8:29 pm
Forum: General Rate Laws
Topic: Unique Reaction Rates [ENDORSED]
Replies: 27
Views: 42657

### Re: Unique Reaction Rates[ENDORSED]

It's a unique reaction rate because its the same for all concentrations of reactants and products when multiplied by their stoichiometric coefficient.
Tue Mar 13, 2018 8:28 pm
Forum: *Alkanes
Topic: How to name the Alcohol
Replies: 4
Views: 627

### Re: How to name the Alcohol

will naming be on the final?
Mon Mar 05, 2018 10:42 pm
Forum: Second Order Reactions
Topic: Order reactions
Replies: 6
Views: 448

### Re: Order reactions

Order reactions are determined by how the rate changes in respect to concentration
Mon Mar 05, 2018 10:40 pm
Forum: General Rate Laws
Topic: Temperature Signifcance
Replies: 4
Views: 164

### Re: Temperature Signifcance

temperature has no relevance for these problems
Mon Mar 05, 2018 10:40 pm
Forum: First Order Reactions
Topic: First order
Replies: 4
Views: 175

### Re: First order

If the other reactant's concentrations remain constant then yes it would be first order
Fri Mar 02, 2018 11:08 am
Forum: First Order Reactions
Topic: First Order Graph
Replies: 11
Views: 321

### Re: First Order Graph

A proper first order graph is just a straight decreasing line?
Fri Mar 02, 2018 11:07 am
Forum: Zero Order Reactions
Topic: Order Reactions [ENDORSED]
Replies: 4
Views: 346

### Re: Order Reactions[ENDORSED]

Order reveals how the concentrations of reactants relate to the rate
Fri Mar 02, 2018 11:07 am
Forum: Zero Order Reactions
Topic: Units of k [ENDORSED]
Replies: 13
Views: 354

### Re: Units of k[ENDORSED]

Unit of K is in a format so that the rate becomes mol/L S
Sun Feb 25, 2018 8:30 pm
Forum: Student Social/Study Group
Topic: Chemistry Joke
Replies: 57
Views: 2177

### Re: Chemistry Joke

What did the basic DJ say?

Drop the base!!!
Sun Feb 25, 2018 8:29 pm
Forum: Student Social/Study Group
Topic: Chemistry Joke
Replies: 57
Views: 2177

### Re: Chemistry Joke

Did you gain an electron because I’m starting to feel some charge
Sun Feb 25, 2018 8:29 pm
Forum: Student Social/Study Group
Topic: Chemistry Joke
Replies: 57
Views: 2177

### Re: Chemistry Joke

These are some funny jokes!!
Tue Feb 20, 2018 11:54 pm
Forum: Student Social/Study Group
Topic: Chemistry Joke
Replies: 57
Views: 2177

### Re: Chemistry Joke

if you aren't part of the solution you're part of the precipitate
Tue Feb 20, 2018 11:52 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 898310

### Re: Post All Chemistry Jokes Here

dont trust an atom. Why? they make up everything
Tue Feb 20, 2018 11:51 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: cell diagram [ENDORSED]
Replies: 2
Views: 96

### cell diagram[ENDORSED]

how do you order the cell diagram aside from anode is left and cathode is right
Mon Feb 12, 2018 10:04 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: 9.63
Replies: 2
Views: 134

### Re: 9.63

If the compound has a negative delta G value then it's stable
Mon Feb 12, 2018 10:02 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: 9.75
Replies: 1
Views: 101

### 9.75

For 9.75, my calculator can't calculate using Botlzmann's because it overflows...what would i do on the exam?
Mon Feb 12, 2018 10:00 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: 9.81
Replies: 1
Views: 107

### 9.81

What is the logic behind the solution to this problem?
Wed Feb 07, 2018 10:30 am
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Open System
Replies: 7
Views: 288

### Re: Open System

you can increase energy via:
3. do work on it
Wed Feb 07, 2018 10:29 am
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Isolated
Replies: 9
Views: 347

### Re: Isolated

Heat is contained in the isolated system so it changes within itself. The only thing that cant be changed is volume because its constant
Wed Feb 07, 2018 10:28 am
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: exothermic
Replies: 5
Views: 198

### Re: exothermic

If a flask turns cold its endothermic because it absorbs heat
Wed Jan 31, 2018 10:24 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Change in S with changes in P, V, and T
Replies: 3
Views: 139

### Re: Change in S with changes in P, V, and T

You wont be asked a problem with all three of those being unknown because its not possible to calculate one without the other 2
Wed Jan 31, 2018 10:22 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: The value of Cp
Replies: 8
Views: 300

### Re: The value of Cp

Cp of ideal gases is 5/2(R) and Cv is 3/2(R)
Wed Jan 31, 2018 10:21 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: sign of entropy
Replies: 11
Views: 250

### Re: sign of entropy

sign of entropy depends on flow of heat
Wed Jan 24, 2018 10:34 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Exothermic
Replies: 7
Views: 188

### Re: Exothermic

for an exo reaction delta H is always negative implying the release of heat (thus the reaction is warmer)
Wed Jan 24, 2018 10:33 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Significant Figures of ∆H
Replies: 3
Views: 151

### Re: Significant Figures of ∆H

yep sig figs will depend on the smallst enthalpy value i.e 322KJ is 3 SF
Wed Jan 24, 2018 10:32 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: 8.63
Replies: 4
Views: 162

### 8.63

For part c does the h20 (1) have a different formation enthalpy because when i calculate evreything my value is off
Sun Jan 21, 2018 11:34 pm
Forum: Phase Changes & Related Calculations
Topic: Work Equation
Replies: 3
Views: 106

### Re: Work Equation

The negative signifies a loss in energy
Sun Jan 21, 2018 11:33 pm
Forum: Phase Changes & Related Calculations
Topic: Test 1 [ENDORSED]
Replies: 7
Views: 309

### Re: Test 1[ENDORSED]

will all the equations be on a formula sheet?
Sun Jan 21, 2018 11:31 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 898310

### Re: Post All Chemistry Jokes Here

An electron went on a date, it was electric
Wed Jan 17, 2018 10:19 am
Forum: Phase Changes & Related Calculations
Topic: Open/Closed/Isolated
Replies: 11
Views: 380

### Re: Open/Closed/Isolated

isolated systems are in fixed quantities with no interaction with its outside environment i.e thermos
Wed Jan 17, 2018 10:18 am
Forum: Phase Changes & Related Calculations
Topic: Open/Closed/Isolated
Replies: 11
Views: 380

### Re: Open/Closed/Isolated

with the lid on a fish tank is a closed system
Wed Jan 17, 2018 10:14 am
Forum: Phase Changes & Related Calculations
Topic: Formula Sheet? [ENDORSED]
Replies: 3
Views: 173

### Re: Formula Sheet?[ENDORSED]

I feel like this formula sheet will include heat capacities etc
Fri Jan 12, 2018 10:24 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 898310

### Re: Post All Chemistry Jokes Here

What do you call a tooth in a glass of water?

A molar solution

*ba dum tss
Fri Jan 12, 2018 10:22 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 898310

### Re: Post All Chemistry Jokes Here

Why can't atoms be trusted?

Because they make up everything
Fri Jan 12, 2018 10:21 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 898310

### Re: Post All Chemistry Jokes Here

What kind of dogs do chemists have?

Laboratory retrievers
Sun Dec 03, 2017 11:27 pm
Forum: Dipole Moments
Topic: When do dipole moments occur?
Replies: 3
Views: 313

### Re: When do dipole moments occur?

Dipole occurs in a covalently bonded atom, usually when the lewis structure is not symmetric (unequal charges)
Sun Dec 03, 2017 11:26 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Chemical Equilibrium
Replies: 3
Views: 202

### Re: Chemical Equilibrium

usually yes it's a liquid or aqueous solution
Mon Nov 27, 2017 9:36 am
Forum: Naming
Topic: prefixes
Replies: 2
Views: 129

### prefixes

How do you determine the proper prefixes for ligands
Mon Nov 27, 2017 9:35 am
Forum: Naming
Topic: coordination compounds
Replies: 1
Views: 108

### coordination compounds

how do you name coordination compounds?
Fri Nov 17, 2017 9:42 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: TM Cations
Replies: 2
Views: 147

### Re: TM Cations

if a TM doesn't form 6 bonds how many bonds would it usually form?
Fri Nov 17, 2017 9:41 pm
Forum: Naming
Topic: Roman Numeral
Replies: 2
Views: 128

### Re: Roman Numeral

the roman numeral represents the charge of the transition metal
Tue Nov 07, 2017 6:41 pm
Forum: Ionic & Covalent Bonds
Topic: Ionic and Covalent Bonds
Replies: 9
Views: 354

### Re: Ionic and Covalent Bonds

Ionic bonds are btween a metal and non metal, and a covalent bond is between two non metals
Tue Nov 07, 2017 6:40 pm
Forum: Lewis Structures
Topic: Shape
Replies: 5
Views: 227

### Shape

Will we get marked off if our shapes our different? say the compound is NCl3, would we get marked off if we had it in the shape of _l_ instead of a mercedes logo type shape?
Wed Nov 01, 2017 11:04 am
Forum: Trends in The Periodic Table
Replies: 4
Views: 253

Atomic radius is half the distance between the center of two atoms. ionic radius is the distance between 2 ions.
Wed Nov 01, 2017 11:02 am
Forum: Trends in The Periodic Table
Topic: Ie [ENDORSED]
Replies: 1
Views: 151

### Ie[ENDORSED]

What is the difference between ionization energy and electron affinity?
Thu Oct 26, 2017 9:28 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: s- electrons vs p- electrons [ENDORSED]
Replies: 7
Views: 403

### Re: s- electrons vs p- electrons[ENDORSED]

It's because of the less shielding
Thu Oct 26, 2017 6:48 pm
Forum: Trends in The Periodic Table
Topic: atomic size
Replies: 4
Views: 227

### atomic size

for atomic radius, if an element is lower on the periodic table but closer to the right side, would it be bigger or smaller than an element higher on the periodic table thats on the left side
Sun Oct 22, 2017 7:44 pm
Forum: DeBroglie Equation
Topic: When to use De Broglie Equation [ENDORSED]
Replies: 11
Views: 1189

### Re: When to use De Broglie Equation[ENDORSED]

Use when you have mass and velocity and need wavelength
Sun Oct 22, 2017 7:44 pm
Forum: DeBroglie Equation
Topic: units for mass
Replies: 6
Views: 349

### Re: units for mass

because joules is per kilogram
Tue Oct 17, 2017 9:00 pm
Forum: Properties of Light
Topic: Rydberg's Constant
Replies: 4
Views: 348

### Re: Rydberg's Constant

In the textbook 3.29x10^15 is the number used to represent Rydberg, so I would use that value.
Tue Oct 17, 2017 8:59 pm
Forum: Properties of Light
Topic: Planck's Constant
Replies: 10
Views: 450

### Re: Planck's Constant

Use planck's constant whenever you need to use/derive equations involving the variable h
Thu Oct 12, 2017 6:32 pm
Forum: Einstein Equation
Topic: question 27
Replies: 2
Views: 237

### question 27

For question 27, it wants moles of photons, and i found energy to be 4.7x10^-19 J/photon, but when converting to just photons the solution Manual turns the 4.7x10^-19 into photons/J to cancel out jules with the 64J. Why did they do this
Thu Oct 12, 2017 4:02 pm
Forum: Photoelectric Effect
Topic: Energy in kj or j when solving a problem?
Replies: 10
Views: 544

### Re: Energy in kj or j when solving a problem?

If we have kg or km should we convert to g and m?
Wed Oct 11, 2017 10:21 pm
Forum: Properties of Light
Topic: Question 1.15
Replies: 1
Views: 163

### Question 1.15

Did anyone understand question 13? What is the Rydberg formula?
Wed Oct 11, 2017 10:17 pm
Forum: Properties of Light
Topic: Velocity [ENDORSED]
Replies: 13
Views: 646

### Velocity[ENDORSED]

Is Velocity (m/s) the same as speed?
Thu Oct 05, 2017 11:02 pm
Forum: Significant Figures
Topic: Does temperature count for sig figs? [ENDORSED]
Replies: 4
Views: 6199

### Re: Does temperature count for sig figs?[ENDORSED]

yes all values incorporated into your calculations count for sig figs
Tue Oct 03, 2017 11:46 pm
Forum: Limiting Reactant Calculations
Topic: Textbook fundamentals M
Replies: 1
Views: 177

### Textbook fundamentals M

Has anyone completed fundamentals part M question 19? I can't seem to get the correct answer