Register to reply 
Question on the gas lawsby D4rk
Tags: laws 
Share this thread: 
#1
May913, 10:53 AM

P: 3

Hey guys. I'm new to the forum :). I'm a high school student who takes physical sciences as one of my subject. The thing is that I've been confused about something I read on chemistry. This might sound stupid but please try and understand that this is confusing me.
In the gas laws, Gay Lussac's law states that: " The pressure of a fixed amount of gas at constant volume is proportional to its absolute temperature". Where in Boyle's law it states that: "The volume of a fixed amount of gas is proportional to its pressure at constant temperature". My question is that since the amount of pressure effects the amount of volume, How can the volume be kept at a constant when the temperature causes a change in pressure ( which in turn effects volume)? Also why is a direct relationship expressed as P/T and an inverse relationship expressed as PV=PV? 


#2
May913, 12:41 PM

Admin
P: 23,536




#3
May913, 02:11 PM

P: 3

I think I'm beginning to get it now. Would this then be a logical explanation for why a balloon pops when exposed to a heat source: The gas molecules around the balloon have an increase in pressure due to increase in temperature, while the gas molecules inside the balloon have a lower pressure because of the lower temperature. Eventually the pressure outside is great enough to crush the inner pressure. 


#4
May913, 03:09 PM

Admin
P: 23,536

Question on the gas laws



#5
May1113, 03:31 AM

P: 1,475

An inverses relationship keeps the product of the variables constant, so if one variable goes up the other variable must decrease. This is basic mathematics. You should review your graphs of equations starting with y=mx +b ( direct relationship ), and continue on with inverse functions, logarithic, exponential, power, sine, etc. A specific "look" to a graph comes in handy when you are plotting data points from a chemistry or physics experiment, and you can then surmise the functioning equation between your variables of the experiment. 


#6
May1213, 09:05 AM

P: 3




Register to reply 
Related Discussions  
Contradiction on kvl kcl laws question..  Engineering, Comp Sci, & Technology Homework  1  
Simple Gas Laws Question  Biology, Chemistry & Other Homework  3  
Question about Log Laws  Precalculus Mathematics Homework  4  
Gas laws question  Biology, Chemistry & Other Homework  1  
Newton Laws Question  Introductory Physics Homework  11 