physics?? i really need help! test on Friday!?

Question

i really dont understand the gas laws. like temperature, pressure, and gas? and how if one changes, it affects another. one example is if a balloon is in the atmosphere on a cold day, the temperature has decreased, so does the pressure and volume decrease too? or does it increase. i would really appreciate if you could explain, because i have a test tomorrow, and ive been studying these gas laws for the past hour, and im more confused. PLZ HELP!!!

Answer 1

the test wasnt that hard. i know cuz i took it too!
ok so temperature makes the atoms have more energy. when they have lots of energy they collide into one another more. so if temp goes up so does pressure. but since they move more they dont have that much moe room. so when temp goes up and pressure goes up volume goes down.
if they dont have energy and "sit" around then they have more room. so if volume goes up then the energy goes down so volume goes up and temp and pressure go down

remember this pressure and temp are similar if one goes up then so does the other one. then volume does the opposite of pressure and temp.

hope i helped :)

Answer 2

It's all about the ideal gas law PV=NkT. Atmospheric pressure P changes a bit from day to day, but not by much, because it's the weight of the atmosphere directly above each square meter of ground regardless of how hot it is. Interpret that statement literally. So when, on the right of the equation., the temperature T falls and N stays the same (no leaks), the left must drop too (k is a constant). If P doesn't change, as explained, then the drop is entirely due to V. Get it? That's how equations work. Good luck!

Answer 3

Temperature is the external manifestation of the internal kinetic energy of the molecules. This energy may be due to velocity of the vibrating/fast moving molecules. (E= ½ m v²) In gases the molecules are in constant random motion (Brownian). When the temperaure increases the internal kinetic energy of the molecules will increase. Naturally their speed too. So the molecules are colliding on the walls of the container.with more force. Hence the pressure increases. If the container is a balloon (walls are elastic) it expands. If the container is made of glass, as it is not elastic, pressure increases.
If the temperature decreases, all the actions will be in the reverse order. Hence the volume too decreases.

Answer 4

basically, you should focus that gas is a matter, that has mass.

any mass whether it be metal/gas/liguid/(anything that has atoms) if you change its temperature it will expand, and vise versa if you expand/compress any mass, its temprature will be affected.

to answer your example, if you lay a balloon in a cold athmosphere it will shrink -- depressurize or implode.

just look at matter as with molecules inside moving like cars with a steady speed. at a steady speed cars tend not to crash with each other(the cars represent molecules) the steady speed represent the temperature, if you **suddenly** change the temperature at a fast rate, the cars will speed up, and we know what happens if cars speed up, they tend to collide with other cars, the collission between cars creates **heat** -- this is temperature.

to explain pressure, pressure is the steady speed of cars.

another example would be a mosh pit in a mega concert like lollapalooza.

the audience, they are the mass, this mass has a steady shaep or form representing the crowd. usually this crowd is fenced with steel bars. when the band is engelbert humperdick, the audience is not moving fast or is not bumping with each other. so the crowd is in a steady state. but when rage against the machines start to play "freedom" the crowd tends to go wild, and a lot if not all audiences start bumping each other, of course the confined fence sometimes will not be enough to hold the bumping of each audience thus the crowd tend to **expand** its size. the pressure here is the force exerted beteen people. thus when the pressure changes the size of it expands.

email me for additional details. i hope this helped

Answer 5

I really have a cellular biology midterm next Saturday, and an organic and organic Chem midterm on the Monday after my Bio midterm. ...*Sigh* on an analogous week as my organic and organic chemistry midterm, I really have a information exam on Friday, and an Inorganic chemistry midterm the subsequent day :D