Advertisements
Advertisements
प्रश्न
Water as ice has a cooling effect, whereas water as steam may cause severe burns. Explain these observations.
Advertisements
उत्तर
Water in the form of ice has low energy since water freezes at a lower temperature. When ice comes in contact with body it draws heat from the body and gives cooling effect. In case of steam, the water molecules have high energy. The high energy of steam is transformed as heat and may cause severe burns.
APPEARS IN
संबंधित प्रश्न
The temperature at which a solid convert into a liquid is called its .........
Molecules of a substance are always in a state of............ and so they possess .............
Differentiate between melting point ,giving atleast one example of each.
What is melting? Give example.
A student heats a beaker containing ice and water. He measures the temperature of the content of the beaker as a function of time. Which of the following (Fig. 1.1) would correctly represent the result? Justify your choice.
Conversion of solid state to liquid state is called fusion; what is meant by latent heat of fusion?
______ is the changing of a liquid into its solid state and it happens by cooling.
A puddle of water gets pooled around the glass of ice cream or a glass of ice cubes. When it is kept at room temperature. Give reason.
Ice does not melt rapidly because of ______.
The solid, liquid, and phases of water can coexist in equilibrium at ______.
