Question

Define boiling point give two factor on which it defined why is food cooked quickly in pressure cooker

Answer 1

Boiling point is the temperature at which vapor pressure of the gas escaping from the liquid gets equal to external pressure or atmospheric pressure.for water , boiling point is at 100°C .

there are two factors on which it defined.
(i) it depends upon external pressure.
(ii) it depends upon purity of solution ( i mean, if we mix non-volatile substance .it will effect on boiling point of main source. )

actually,A pressure cooker works on a simple principle that is Steam pressure. A sealed pot, with a lot of steam inside, builds up high pressure, which helps food cook faster.

Answer 2

Hi,

let us first discuss boiling point.As we all know

water boils at 100°C at 1 atm pressure.so ,how

we define boiling point.


Definition of boiling point:
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It is that temperature of a liquid at which vapour pressure of liquid is equal to the surrounding pressure.

Factors affecting boiling point:
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There are few factors,which affects boiling
point,here we are discussed two of them

1) Pressure:
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if pressure decreases than boiling point decreases. for eg: at high altitudes atmospheric pressure is low so ,water boils there at low temperature( about 75-80°C).
so we can say boiling point is directly proportional to Boiling point.
2) Intermolecular force
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if Intermolecular forces are strong than boiling point is high .

❓❓❓❓Why food is cooked fast in pressure cooker?
⏩⏩⏩⏩ As it is totally packed system, pressure increase very fast as compared to atmospheric pressure,so as presser increases,correspondingly temperature have to be Increases,it is about 200-250°C,which is very high to cook food fast.

hope it helps you.