A student collected the following data for a fixed volume of gas:
Temperature (⁰C) Pressure (mm of Hg)
10 726
20 750
40 800
70 880
100 960
150 ???
Fill in the missing data point. Show all calculations leading to an answer.

Question

A student collected the following data for a fixed volume of gas:
Temperature (⁰C)	Pressure (mm of Hg)
10	726
20	750
40	800
70	880
100	960
150	???
Fill in the missing data point.  Show all calculations leading to an answer.

rushwr · Answer

we know for a fixed volume the no. of moles is also fixed. SO in PV=nRT equation V , n and R is constant ( R is universal gas constant so it is anyways constant  )
So we can say that $$P \alpha T$$ Pressure is directly proportional to the temperature. 
$$\frac{ P _{1} }{ T _{1} }= \frac{ P _{2} }{ T _{2} }$$

anonymous · Answer

okay can please explain more

rushwr · Answer

So use one set of known of data and the unkonwn set like this ! 
P1/T1=P2/T2
So let's say that the unknown pressure is P1
then P1= P2 x T1 /T2

rushwr · Answer

If we use the 1st set of data given !
P1= ?
T1= 150 C
P2 = 726
T2 = 10

rushwr · Answer

Did u get it ?

anonymous · Answer

yes thanks