i want to sleep.

random stuff: i feel so dead now. i just want to get over it, and enjoy my sleep!

just came home from toa payoh. damn shagged now, even though i didn't do much other than the 2 full topics of chemistry for today and highlighting notes and stuff. didn't touch my maths at all though i brought them out to lib today.

nothing much today, except that i see more peeps sleeping in library openly nowadays. in the past few days, the security guard has to act as an alarm clock to wake all sleepy patrons up. and let me write a bit about my learning journal today.

"today, i learnt
THE GASEOUS STATE
PV=nRT

the assumptions of kinetic theory of gases
- volume of gas molecules is negligible compared with that of container
- no forces of attraction between gas molecules

real gas deviates from ideal gas behaviour because
- molecule of a real gas has a definite molecular size
- forces of attraction between gas molecules

real gas behaves ideally at:
- High temperatures: molecules have higher kinetic energy and hence have sufficient energy to oversome effect of intermolecular forces
- Low pressures: volume occupied by gas is large and the gas molecules are well spaced out. Thus, volume of the gas molecules becomes negligible compared to the volume of gas.

CHEMICAL EQUILIBRIUM
Le Chatelier's principle: if a system in equilibrium is subjected to a change which disturbs the equilibrium, the system responds in such a way to counteract the effect of change.

When pressure is increased, the position of equilibrium shifts to the right as to reduce the pressure by decreasing no. of gas molecules.

(For endothermic)
As temperature increases, equilibrium shifts to the right to favour the exothermic reaction so as to produce some heat and result in less products formed."


damn tired now. good nitex