Search found 8 matches

by Ace 3F
Sun Mar 12, 2017 8:06 pm
Forum: General Science Questions
Topic: Why do 8 electrons form a stable shell? [ENDORSED]
Replies: 2
Views: 480

Why do 8 electrons form a stable shell? [ENDORSED]

I'm pretty sure that others have probably gone over this before but I don't recall having learned why exactly it is 8 electrons that form a stable shell, I know it has to do with electron spins although I'm not sure what dictates it exactly.

Thank you!
by Ace 3F
Sun Mar 05, 2017 11:12 pm
Forum: *Organic Reaction Mechanisms in General
Topic: Homework Problem Number 98 Chapter 15
Replies: 1
Views: 260

Homework Problem Number 98 Chapter 15

Suppose that a pollutant is entering the environment at a steady rate R and that, once there, its concentration decays by a first order reaction. Derive an expression for (a) the concentration of the pollutant at equilibrium in terms of R and (b) the half-life of the pollutant species when R = 0. Pl...
by Ace 3F
Sun Feb 26, 2017 10:50 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Does a reversible system even exist?
Replies: 1
Views: 376

Does a reversible system even exist?

https://qph.ec.quoracdn.net/main-qimg-75284706ae3870bfea4fd758227126ae-c I was just wondering that if energy is always transferred in quanta or certain discrete values, then practically can their ever be a reversible reaction? Or do we assume infinitesimally small is equal to the magnitude of such ...
by Ace 3F
Sun Feb 19, 2017 11:05 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7567
Views: 1010994

Photonic Joke

A photon checks into a hotel and is asked if he needs any help with his luggage.....

He replies "No I'm traveling light"
by Ace 3F
Sun Feb 12, 2017 9:00 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7567
Views: 1010994

Re: Post All Chemistry Jokes Here

Let's take all these bad Chemistry jokes........ and Barium! :P
by Ace 3F
Sun Jan 29, 2017 6:08 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Is there a difference between Thermal energy and Kinetic energy? [ENDORSED]
Replies: 1
Views: 931

Is there a difference between Thermal energy and Kinetic energy? [ENDORSED]

If thermal energy is the energy that comes from heat, and heat is the result of the faster movement of a substance's particles, which is ultimately nothing but more kinetic energy in its particles. Then do the two have the same meaning?
by Ace 3F
Sun Jan 22, 2017 6:39 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Universe as a system [ENDORSED]
Replies: 2
Views: 277

Universe as a system [ENDORSED]

This might be a stupid question but how is the universe an isolated system?
The energy of an isolated system must remain constant because no matter or heat can be transferred and the system cannot be physically changed (ΔV = 0)
Since the Universe is expanding, how is it an isolated system?

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