Answer
$P_{2}=3.36MPa$
Work Step by Step
Knowing that:
$m_{1}=m_{2}$
$V_{1}=V_{2}$
$P_{2}=P_{1}\frac{T_{2}}{T_{1}}=\frac{1.2MPa*(1750+273.15)K}{(450+273.15)K}=3.36MPa$
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