Thursday, July 9, 2009

If a 90 ml sample of gas is heated from 45.5 C, what is the volume of the new sample if the pressure is held c

the last word is constant

If a 90 ml sample of gas is heated from 45.5 C, what is the volume of the new sample if the pressure is held c
T1 = 45.5 + 273 =318.5 K





at constant pressure ( Charles' law)





V1/T1 = V2 / T2





90 / 318.5 = V2 / T2





if you know T2 you can get V2
Reply:Need the final temperature.





The equation is the Ideal Gas Law, which is


PV=nRT.





R is a constant = 287 J/(kg K)


The temperature is used as Kelvins, so 45.5 C = 318.5 K (add 273 to convert)
Reply:dude u need to mention the final temperature also...


u r supposed to use the eqn:





PV= nRT =%26gt;V=nRT/P


ur Q is not complete...though i can tell u the final formula to put the data into and get the answer..


since the volume is constant,


nR x (initial temperature) / (initial pressure)=nR x (final temperature) / (final pressure)


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