Question

9. Carbon dioxide was taken in an enclosed cylinder and compressed by applying pressure.
(a) Which state of matter is obtained after completion of process?
(b) Name & define the process.
(c) What is the common name of the product obtained?
10. Enumerate the changes that take place inside the matter during the change of state. List any 3 changes.
11. What do you mean by latent heat of fusion of ice? Why temperature remains constant during change of states?
12.
(a)Define evaporation. How does it causes cooling effect?
(b) How does surface area, temperature and humidity effects the rate of evaporation.
13. Give reason -
(a) Water droplet appear on the outer surface of a tumbler containing ice cold water.
(b) People prefer to wear cotton clothes in summer.
(c) On a hot summer day people sprinkle water on the roof or open ground,
14 (a)A liquid penerally flow easily. Why?
(b) why do we feel comfortable under a fan when we are perspiring?
(c) ice at 0 degree celsius appears colder to the mouth than water at 0 degree celsius. why ?​

Answer 1

Answer:

Diffusion is net movement of ions and molecules from a region of higher concentration to a region of lower concentration. Diffusion is driven by a gradient in chemical potential of the diffusing speciesBoiling is the rapid vaporization of a liquid, which occurs when a liquid is heated to its boiling point, Latent Heat of fusion: The amount of heat energy that is required to change 1 kg of solid into liquid at atmospheric pressure at its melting point is known as the Latent Heat of Fusion. ... Sublimation: Matters change their state from solid to liquid and from liquid to gas on the application of heat.Boiling is the rapid vaporization of a liquid, which occurs when a liquid is heated to its boiling point, Latent Heat of fusion: The amount of heat energy that is required to change 1 kg of solid into liquid at atmospheric pressure at its melting point is known as the Latent Heat of Fusion. ... Sublimation: Matters change their state from solid to liquid and from liquid to gas on the application of heat.