A burn from steam at 100 °C is expected to be more severe than a burn from boiling water at 100 °C because

• you are more likely to come into contact with the steam than with the boiling water
• there is more steam than water
• the steam is hotter than the boiling water
• the steam will give off a large amount of heat as it condenses
All of these answers are correct.

All of these answers are correct. However, the severity of a burn depends on various factors such as the exposure time, the temperature, and the volume of the substance causing the burn.

All of these answers are correct.