Question

26.A balloon when kept in sun, bursts after some time. Why?
27.Pressure and temperature determine the state of a substance. Explain this
in detail.
28.Explain giving examples the various factors on which rate of evaporation
depends.
29.How does a gas exert pressure on the walls of a container in which it is
kept?
30.Solids have the least tendency to diffuse & gases have the maximum.
Explain.

Answer 1

Hey Mate,

Here Is Your Answer

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26.
When the balloon is kept in the sun, due to Sun's heat, the kinetic energy of gaseous particles inside the balloons also gets increased and the balloon expands. This will increase the pressure on the walls of the balloon. It continues to expand and comes to a stage when the baloon bursts.

27.
A solid can be converted into liquid and then to gas by decreasing the pressure and increasing the temperature.Every state of matter of any substance is stable at a corresponding pressure and temperature. Thus, temperature and pressure determines the state of a substance.

28.
Surface area: If the surface area is increased the rate of evaporation also increases.Example-To dry the clothes we spread them to dry faster.

29.
he molecules are continually colliding with each other and with the walls of the container. When a molecule collides with the wall, they exert small force on the wall The pressure exerted by the gas is due to the sum of all these collision forces.The more particles that hit the walls, the higher the pressure.

30.
Solids have the least tendency to diffuse and gases have the maximum tendency because the particles of gas have the largest spaces between them and are able to diffuse easily and solids have the least spaces between its particles due to which they diffuse the least.

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Hope It Helps You.