At a pressure of 100 kPa absolute, how many litres of steam will 1 litre of water become?

To determine how many liters of steam 1 liter of water becomes at a pressure of 100 kPa absolute, it's essential to understand the relationship between water and steam in terms of volume and temperature.

When water is heated and converted to steam, significant changes occur. At 100 kPa (which is close to the saturation pressure of water at temperatures around 120 degrees Celsius), 1 liter of water will expand tremendously upon conversion into steam. This expansion is a fundamental characteristic of phase changes from liquid to vapor.

The specific volume of steam at this pressure must be referenced from steam tables. At 100 kPa, steam has a specific volume of approximately 11.67 m³ per kilogram, which correlates to approximately 11,670 liters/kg. Since 1 liter of water has a mass of about 1 kilogram, that 1 liter of water will convert to around 11,670 liters of steam.

However, in the context of the given options, the volume change does not refer directly to the mass of steam produced but rather to the volume displaced during the phase change. Because the complete transformation into steam at this pressure significantly compresses the vapor, the final volume can be shorter due to the conditions applied.

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