madscientistchem.blogspot.com
Mad Scientist (Chemistry): June 2007
http://madscientistchem.blogspot.com/2007_06_01_archive.html
When we wish to observe a change in something we can describe that thing as a 'system'. Everything else relevant to our observations of that system is it's 'surroundings'. The internal energy(E) of a system is the sum of the potential and kinetic energies of all its particles. When energy is transferred between a system and its surroundings it is always transferred in the form of work and/or heat. Work(w) is the energy transferred when a force moves an object. Where = 'change in'. Saturday, June 30, 2007.
madscientistchem.blogspot.com
Mad Scientist (Chemistry): July 2007
http://madscientistchem.blogspot.com/2007_07_01_archive.html
When a substance is heated, its change in temperature( T). Is proportional to the quantity of heat energy it absorbs(q), thus:. Q/ T = constant. The value of this constant is different for each substance and is called that substance's 'heat capacity'. The specific heat capacity(c) of a substance is the amount of heat energy required to raise 1 gram of that substance by 1 degree kelvin. C = q/(mass * T). C = q/(moles * T). Posted by Chris @ 3:59 pm. Thursday, July 05, 2007. How is it used? In reactions su...
madscientistchem.blogspot.com
Mad Scientist (Chemistry): Enthalpy
http://madscientistchem.blogspot.com/2007/07/enthalpy.html
Enthalpy(H), or 'heat content,' is a variable that describes the thermodynamic potential(hence 'heat content') of a system. The enthalpy of a system is defined as its internal energy plus the product of the pressure on it(P) and its volume(V). How is it used? In many reactions the only type of work done is that of a newly formed gas expanding and pushing back the atmosphere. This is called PV work, and is equal to the product of the pressure of the atmosphere and the change in volume of the gas.
madscientistchem.blogspot.com
Mad Scientist (Chemistry): The Food Chain
http://madscientistchem.blogspot.com/2007/06/true-food-chain.html
I'm just testing image posting.). Posted by Chris @ 11:01 am. Monday, June 25, 2007. Enter your search terms. Colligative Properties of Solutions. Conduction and Band Theory.
madscientistchem.blogspot.com
Mad Scientist (Chemistry): Nuclear Charge
http://madscientistchem.blogspot.com/2007/06/nuclear-charge.html
The nuclear charge, Z, of an atom's nucleus is the total charge of all the protons it contains (the same as its atomic number.) Lower orbital electrons can in effect "shield" higher orbital electrons from some of the positive charge of the nucleus, changing the Z that higher orbital electrons 'perceive'. Effective nuclear charge, Z. Is the net positive charge of the nucleus as perceived by an electron. Posted by Chris @ 11:31 am. Monday, June 25, 2007. Enter your search terms. Conduction and Band Theory.
madscientistchem.blogspot.com
Mad Scientist (Chemistry): Periodic Table
http://madscientistchem.blogspot.com/2007/06/periodic-table.html
Click image for full size version. Posted by Chris @ 11:11 am. Monday, June 25, 2007. Enter your search terms. Colligative Properties of Solutions. Conduction and Band Theory.
madscientistchem.blogspot.com
Mad Scientist (Chemistry): Energy
http://madscientistchem.blogspot.com/2007/06/energy.html
When we wish to observe a change in something we can describe that thing as a 'system'. Everything else relevant to our observations of that system is it's 'surroundings'. The internal energy(E) of a system is the sum of the potential and kinetic energies of all its particles. When energy is transferred between a system and its surroundings it is always transferred in the form of work and/or heat. Work(w) is the energy transferred when a force moves an object. Where = 'change in'. Saturday, June 30, 2007.
madscientistchem.blogspot.com
Mad Scientist (Chemistry): Colligative Properties of Solutions
http://madscientistchem.blogspot.com/2006/09/colligative-properties-of-solutions.html
Colligative Properties of Solutions. Colligative means collective.). Properties of a solution are influenced by the number of solute particles present. 1 VP (Vapor Pressure) is lowered. 2 BP (Boiling Point) is elevated. 3 FP (Freezing Point) is lowered. 4 OP (Osmotic Pressure) is increased. Volatility is the tendency of a substance to become a gas.). Electrolytes are a mixture of ions that when dissolved in solution conduct a current.). When a nonvolatile nonelectrolyte substance is dissolved in solution:.
madscientistchem.blogspot.com
Mad Scientist (Chemistry): September 2006
http://madscientistchem.blogspot.com/2006_09_01_archive.html
Atomic size increases down the groups as more protons are added to the nucleus and higher electron energy levels are filled. It decreases from left to right across the periods as the same electron energy level is filled and the larger nucleus pulls the electrons closer. (Electron shielding lowers Z eff. Less than increasing numbers of protons in the nucleus raises it). Group 1 (Alkali Metals). In their periods they have the lowest molar mass, the largest atomic size, and (thus) the lowest density. Despit...
