Search found 11 matches
- 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: 928
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?
- Sun Mar 12, 2017 9:47 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3767244
- Sun Mar 05, 2017 9:37 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: adsorption?
- Replies: 2
- Views: 688
adsorption?
can someone explain what adsorption mean explicitly?
- Sun Feb 19, 2017 9:47 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3767244
Re: Post All Chemistry Jokes Here
i can't say its a joke but had to buy this at Trader Joe's
- Sat Feb 11, 2017 12:00 am
- Forum: Balancing Redox Reactions
- Topic: has anyone tried 14.4.b?
- Replies: 1
- Views: 651
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.
but I am not sure how many electrons I should add to the half to reaction to equalize the number of electrons.
- Sun Feb 05, 2017 7:40 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3767244
Re: Post All Chemistry Jokes Here
I would be like..
- 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: 506
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
one mole of So2F2, of course, have number of molecules that is equal to the Avogadro's number
so W=6^Na
- Sat Jan 28, 2017 11:32 am
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: question 9.19
- Replies: 1
- Views: 541
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...
- Sat Jan 28, 2017 11:27 am
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Homework 9.23
- Replies: 1
- Views: 463
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= ...
- 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: 553
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...
- Sun Jan 15, 2017 8:36 pm
- Forum: Phase Changes & Related Calculations
- Topic: Other examples of elements which go through sublimation
- Replies: 4
- Views: 4274
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...