Solid sodium reacts with liquid water to form hydrogen gas according to the equation 2Na(s) + 2HO(l) 2NaOH(aq) + H(g) What is the pressure

Solid sodium reacts with liquid water to form hydrogen gas according to the equation

2Na(s) + 2H₂O(l) → 2NaOH(aq) + H₂(g)

What is the pressure of hydrogen gas in the 20.0 L head space of a reactor vessel when 1.00 kg sodium is reacted with excess water at 50°C?