To answer this item, it is first assumed that the gas given is ideal such that it follows the equation,
PV = nRT
where P is pressure, V is volume, n is number of moles, R is the universal gas constant, and T is temperature.
If in the equation, only T and V are changed and all else are constant then,
V1/T1 = V2/T2
Substituting the known values,
2.5L/(35 + 273.15) = 5/(T2)
The value of T2 from the equation is 616.3K which is also equal to 343.15°C.
Answer: 343.15°C
