A container with a capacity of 1m ^ 3 contains 0.9kg of water and 1.6kg of oxygen.

A container with a capacity of 1m ^ 3 contains 0.9kg of water and 1.6kg of oxygen. Knowing that the water has completely evaporated at a temperature of 500 ° C, you need to find the pressure in the container.

The number of moles of water is: 0.9 / 18 * 10 ^ -3 = 50,
the amount of oxygen: 1.6 / 16 * 10 ^ -3 = 100,
total amount of substance: 50 + 100 = 150.
Next, we use the Mendeleev-Clapeyron equation: pv = ηRT, where η is the number
moles of substance, R-universal gas constant,
expressing the temperature in Kelvin, 500C = 773 K, we get:

p = ηRT / v = 150 * 8.31 * 773/10 ^ 3 = 963.5 Pa.