YEAH!!

oh oh i was studying my chemistry!! i finally understood the part ive been reading millions of times!!! i mean really abt this entropy shit which i so didnt learn in JC which i wish my sch shd have! hahha.. so let me explain to you cz when i could explain it to myself i was like OMG!!!! i totally understand!!!! COOL!!!

k i just want to explain smth you guys would prob have NO CLUE abt so just bear with me! im so excited that ive finally got it! k the entropy for an isothermal expansion of an ideal gas is spontaneous. WHY? because for an ideal gas, internal energy is zero as mentioned by the first law. since U=q+w, U=0, q=-w!!!! assuming that the gas expanded in vacuum so there is no work done. w=0. therefore q=0. then the ds for the system is ds(sys)=dq(sys)/T. since dq=0 so, ds(sys) =0. for the surrounding the formula is ds(sur) > dq(sys)/T therefore.. ds(sur) > 0.
hence change in S total will be >0 because you sum up ds(sys) + ds(surr) >0!!! hence, the isothermal expansion of an ideal gas is a spontaneous reactioN!!!!!!!!

im so happy!!!!! i noe you guys dun get it! bear with me!! hahaha!!! ok i want to do lots of stuffs after my exams..so im taking that as a form of motivation to study hard for the exams!!! hahah!! i wan to read books!!! i wana make stuffs! i wana enjoy life to the fullest!!! IM BACK!!!!!

fina!!! shout out loud!!!