Answer
$55.2 \ kPa$
Work Step by Step
We know the following equation:
$\frac{P_2}{P_1}=\frac{T_2}{T_1}$
Thus, we find:
$\frac{274.16}{273.16}=\frac{P_2}{55} \\ P_2 = 55.2 \ kPa$
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