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Find the work done when 18 ml of water i...

Find the work done when 18 ml of water is getting vapourised at 373 K is open vessel
(Assume the ideal behaviour of water vapour).

Text Solution

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`PV=nRT" "["V in liter and T in kelvin"]`
`PV=1xx0.0821xx373`
`PV=30 "litre"`
`V=30 "litre"`
`W=-PDeltaV`
`=-1(30-V_(gas))" "[18"ml is negligilble as compared to 30 litre"]`
` =-1xx30=-30 "litre atm".`
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Calculate the work donw when 1.0 mol of water at 100^(@)C vaporises against an atmospheric pressure of 1atm . Assume ideal behaviour and volume of liquid water to be negligible.

Calculate the work done when done when 1.0 mol of water at 373K vaporises against an atmosheric pressure of 1.0atm . Assume ideal gas behaviour.

Assuming that water vapour is an ideal gas, the internal energy change (Delta U) when 1 mol of water is vapourised at 1 bar pressure and 100^(@)C , (Given: Molar enthalpy of vapourization of water at 1 bar and 373K=41 kJ mol^(-1) and R=8.3J mol^(-1)K^(-1) ) will be:

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