what is the answer for this
Attachments:
Answers
Answered by
1
5. what is the physical state of water at -
(a) 25 °C
answer- liquid state
(b) 0°C
answer- solid state can also be in liquid state (conditions required).
(c) 100°C
answer- gaseous state can also be in liquid state (conditions required).
6. give two reasons to justify -
(a) water at room temperature is a liquid.
answer- water at room temperature is a liquid because it has fluidity also it has no shape but has a fixed volume that is, it occupies the shape of the container in which it is kept.
(b) an iron almirah is a solid at room temperature.
answer- an iron almirah is a solid at room temperature it has rigid and fixed shape.
7. why is ice at 273 K more effective in cooling than water at the same temperature?
answer - ice at 273 K has less energy than water (although both are at the same temperature). water possesses the additional latent heat of fusion. Hence, at 273 K, ice is more effective in cooling than water.
8. What produces more severe burns, boiling water or steam?
answer- steam has more energy than boiling water. it possesses the additional latent heat of vaporisation. Therefore, burns produced by steam are more severe than those produced by boiling water.
9. name A,B,C,D,E and F in the following diagram showing change in its state.
answer -
(a) 25 °C
answer- liquid state
(b) 0°C
answer- solid state can also be in liquid state (conditions required).
(c) 100°C
answer- gaseous state can also be in liquid state (conditions required).
6. give two reasons to justify -
(a) water at room temperature is a liquid.
answer- water at room temperature is a liquid because it has fluidity also it has no shape but has a fixed volume that is, it occupies the shape of the container in which it is kept.
(b) an iron almirah is a solid at room temperature.
answer- an iron almirah is a solid at room temperature it has rigid and fixed shape.
7. why is ice at 273 K more effective in cooling than water at the same temperature?
answer - ice at 273 K has less energy than water (although both are at the same temperature). water possesses the additional latent heat of fusion. Hence, at 273 K, ice is more effective in cooling than water.
8. What produces more severe burns, boiling water or steam?
answer- steam has more energy than boiling water. it possesses the additional latent heat of vaporisation. Therefore, burns produced by steam are more severe than those produced by boiling water.
9. name A,B,C,D,E and F in the following diagram showing change in its state.
answer -
Attachments:
Similar questions