Question

At what pressure does the boiling point of water become 350°C? If oceanic pressure increases by 0.5 atm for every 5 m, to what ocean depth does this pressure correspond? ΔHvap,m for water is 44.03 kJ/mol.

Answer 1

boiling point is defined as tempreture at which vapour pressure become equal to atomospheric pressure

boiling point of water at 1.00 atm pr essure 100⁰C to boil at then how many pressure required to it become 350⁰C

we know the equation

P₁/T₁ = P₂/T₂

where P₁ = Initial Pressure = 1 atm, P₂ = Final Pressure = ?, T₁ = Initial Tempreture =100⁰C,                              T₂ = Final Tempreture = 350⁰C

we can write above equation

P₂ = P₁T₂/T₁

= 1350/100

= 3.5 atm

at 3.5 atm prssure boiling point of water become 350°C

initaial pressure is 1 atm

we have to increase it 1 to 3.5 atm that mean we have to increase 2.5 atm

every 5 meter it increases 0.5 atm then to increase 2.5 atm

2.55/0.5 = 25 m

at depth of 25 meter pressure become 3.5 atm.