Answer:
[tex]T_{2} = 606.69 K[/tex]
Explanation:
In that the gas thermometer is a constant volume, it is satisfied that:
[tex]\frac{P_{1} }{T_{1} } = \frac{P_{2} }{T_{2} }[/tex]
How the boiling water is under regular atmospheric pressure, then
[tex]T_{1} = 373 .15 K[/tex]
Thus
[tex]\frac{286000}{373.15} = \frac{465000}{T_{2} }[/tex]
[tex]T_{2} = 606.69 K[/tex]