Question

water is boiling at one atmospheric pressure in an open vessel and at 1.2 atmospheric pressure in a pressure cooker which has higher temperature and why please answer the why​

Answer 1

Explanation:

Boiling of water at 1 atm = 100 °C = 373 K

Boiling point of water in pressure cooker when pressure = 1.2 atm

$P_1=1 atm$

$T_1=373 K$

$P_2=1.2 atm$

$T_2=?$

Pressure exerted by the gas is directly proportional to the temperature of that gas when the volume is kept constant

Temperature inside pressure cooker is higher because pressure was higher than the normal atmospheric pressure that 1 atm. This is hwy water boils at higher temperature in a pressure cooker.

$\frac{P_1}{T_1}=\frac{P_2}{T_2}$  (Gay Luassac's law)

$T_2=\frac{1.2 atm\times 373 K}{1 atm}=447.6 K$

$T_2=447.6 K=174.6 ^oC$