Do i need more data to solve this ideal gas problem

1. Jan 24, 2008

1. The problem statement, all variables and given/known data
IF I know P and V at point a,
and V and T at point b, can i find P2 at point B, or is more info required to solve???

(i attached the graph)

point a

known
Va = 5L
Pa = 2atm

unknown
na = ?
Ta = ?

point b

known
Vb = 5L
Tb = 300K

unknown
nb = ?
Pb = ? (this is what i want)

2. Relevant equations
Is it actually possible to get pressure at point b, or is more info required????
thanks

3. The attempt at a solution
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

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2. Jan 24, 2008

if i equate 2 PV=nRT equations to each other, then "n" ends up cancelling (fixed amount) and then after all the calcs i always end up with 2 variables, so unsolvable
i end up with .

TbPa = constant

????