Question

Compared to a burn due to water at ${100}^{\circ }C,$ a burn due to steam at ${100}^{\circ }C,$ is

• A. More dangerous
• B. Less dangerous
• C. Equally dangerous
• D. None of these

Answer 1

The correct option is A More dangerous

Energy is needed for phase change of water. To convert water at ${100}^{\circ }C$ to steam at ${100}^{\circ }C$ we need to supply $mL$ amount of heat energy where $m$ is mass and $L$ is latent heat of vaporization.

Steam at ${100}^{\circ }C,$ contains extra 540 calorie/gm energy as compare to water at ${100}^{\circ }C.$ So it's more dangerous to burn with steam then water.