Search found 11 matches

by Yeon Hee Park 3M
Sun Mar 19, 2017 9:34 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: The answer for the body temperature problem on the final?
Replies: 2
Views: 596

The answer for the body temperature problem on the final?

did we have to find the moles to find out the answer for the problem with the heat capacity?
by Yeon Hee Park 3M
Sun Mar 12, 2017 9:47 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7606
Views: 1017659

Re: Post All Chemistry Jokes Here

alright
by Yeon Hee Park 3M
Sun Mar 05, 2017 9:37 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: adsorption?
Replies: 2
Views: 353

adsorption?

can someone explain what adsorption mean explicitly?
by Yeon Hee Park 3M
Sun Feb 19, 2017 9:47 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7606
Views: 1017659

Re: Post All Chemistry Jokes Here

i can't say its a joke but had to buy this at Trader Joe's
by Yeon Hee Park 3M
Sat Feb 11, 2017 12:00 am
Forum: Balancing Redox Reactions
Topic: has anyone tried 14.4.b?
Replies: 1
Views: 268

has anyone tried 14.4.b?

the oxidation number of carbon increases from -2 to -4/3 so I get it is an oxidizing agent, and reduction half reaction.
but I am not sure how many electrons I should add to the half to reaction to equalize the number of electrons.
by Yeon Hee Park 3M
Sun Feb 05, 2017 7:40 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7606
Views: 1017659

Re: Post All Chemistry Jokes Here

I would be like..
by Yeon Hee Park 3M
Sat Jan 28, 2017 11:38 am
Forum: Third Law of Thermodynamics (For a Unique Ground State (W=1): S -> 0 as T -> 0) and Calculations Using Boltzmann Equation for Entropy
Topic: Positional/Residual Entropy
Replies: 1
Views: 251

Re: Positional/Residual Entropy

it is just referring to the one mole of SO2F2
one mole of So2F2, of course, have number of molecules that is equal to the Avogadro's number
so W=6^Na
by Yeon Hee Park 3M
Sat Jan 28, 2017 11:32 am
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: question 9.19
Replies: 1
Views: 284

Re: question 9.19

final answer should be 11J/(K*mol) steps: 1) prepare calculations by converting all the Celsius degrees to Kelvin 2) raise water to 373K using heat capacity of LIQUID water and nCln(T2/T1) you should get 3.09JK^-1mol^-1 3) Let it vaporize using standard entropy of vaporization -109 J/(mol*K) 4) cool...
by Yeon Hee Park 3M
Sat Jan 28, 2017 11:27 am
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Homework 9.23
Replies: 1
Views: 218

Re: Homework 9.23

at K=0 you can basically ignore entropy due to the thermal energy. So now it is time to see the structure- or positional disorder bf3 and cof2 both have trigonal planar there is only one positional possibility for bf3 however for cof2, you can have 3 so using the equation you may know that delta S= ...
by Yeon Hee Park 3M
Sun Jan 22, 2017 6:01 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Internal Energy and State Function [ENDORSED]
Replies: 1
Views: 254

Re: Internal Energy and State Function [ENDORSED]

delta U means an internal energy, as you may know, and is a state function. State function means that it does not depend on how the system got from the initial to the final state. However q and w is not state functions and path dependent functions. How does this work? Let's take an example of hiking...
by Yeon Hee Park 3M
Sun Jan 15, 2017 8:36 pm
Forum: Phase Changes & Related Calculations
Topic: Other examples of elements which go through sublimation
Replies: 4
Views: 1021

Re: Other examples of elements which go through sublimation

I was wondering the same thing and, while looking through the forum, I found someone asked a same question about last year. The answer said Iodine crystals, water (pg 285), and chemicals in the mothballs (naphthalene) are also common substances that sublimate. I have seen and known that iodine cryst...

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