You want a potof water to boil at 105 celcius. how heavy a
lid should youput on the 15 cm diameter pot when patm =
101kpa?

35.7 kg lid we put

Explanation:

given data

temperature = 105 celcius

diameter = 15 cm

Patm = 101 kPa

to find out

How heavy a  lid should you put

solution

we know Psaturated from table for temperature is 105 celcius is

Psat = 120.8 kPa

so

area will be here

area =    ..................1

here d is diameter

put the value in equation 1

area =

area = 0.01767 m²

so net force is

Fnet = ( Psat - Patm ) × area

Fnet = ( 120.8 - 101 ) × 0.01767

Fnet = 0.3498 KN = 350 N

we know

Fnet = mg

mass =

mass  =

mass = 35.7 kg

so 35.7 kg lid we put

oil flow is a highly convective flow compared to water flow at normal temperature and pressure.