I have two questions regaring my homework assignmnet
1) Is there a "spontaneous process" where the "entropy of the surrounding" decreases?
If so, what kind of reactions (or process) falls into this category? I was trying to
think of something but couldn't/
2) and this was is just to...
finding volume by integration
Homework Statement
Consider the region bounded by y=e^x, the x-axis, the y-axis, and the line x = 1. A solid is created so that the given region is its base and cross-sections perpendicular to the x-axis are squares. What is the volume of a slice perpendicular...
oh.. NH4+ is not a strong acid..
how do I approach this problem then?
If K>1, net direction is right,
then shouldn't the reactants be stonger acid and stronger base?
Consider the following solutions and their respective pH values. Which substance would be effective(K>1) for the deprotonation of NH4+ ?
0.1 M A, pH = 6.85
0.1 M B, pH = 7.22
0.1 M C, pH = 8.34
0.1 M D, pH = 11.88
1) A
2) B
3) C
4) D
5) none are effective
If the reaction to...
Homework Statement
Stearic acid, nature's most common fatty acid, dimerizes when dissolved in hexane:
2C17H35COOH --> (C17H35COOH)2 H°rxn = -172 kJ
The equilibrium constant for this reaction at 28°C is 2900. Estimate the equilibrium constant at 38°C.
1) 4.7 *10^5
2) 1.9 * 10^3...
Okay.. I think I got the second one (with right triangle slice)
The "base" of the triangle should be sqrt((R^2-x^2)) (<- I got this from x^2+y^2=R^2)
and the "height" of the trangle is going to be sqrt((R^2-x^2))*tanα
(since tanα = height/base.. and you know "base" from above.. so you solve...
http://img408.imageshack.us/my.php?image=picture20017hu6.jpg
The attachement contains both problem and the attemp at a solution.
Specifically, I am stuck on finding the equation for the hight for each solid.
(height "a" for both solids)
Should I just set up a random letter to indicate the...
When you add more solid NaOH,, more CO2 molecules will react with NaOH; thus, decreasing the moles of CO2.. Am I right,,?
But still, does solid really have anything to do with this?
I don't think I understand the reason why we don't include solid in equilibrium constant
Homework Statement
The following reaction is at equilibrium at one atmosphere, in a closed container
NaOH(s) + CO2(g)-> NaHCO3 (s)
which, if any, of the following actions will decrease the total amount of CO2 gas present at equilibrium?
1)decreasing the volume of the container
2) none...