Assume that a container of liquid purified water at p-1 bar can be superheated to reach t 376 k without boiling. a nucleation event then takes place and the water quickly reaches equilibrium. a. calculate the percentage volume increase upon the nucleation (i. e. how does the volume of the remaining liquid and produced vapor compare to the volume of the liquid prior to use heat capacity at constant pressure value 4.215 j/(gk). the enthalpy change on vaporization at t-373 k is hy- hl 2257.4 j/g. the specific volumes of vapor and liquid are v 1.6939 m3/kg and vl-0.00104 m3/kg.

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air

in a tire you fill a tire with air

then a couple days later you check the air pressure in the tire

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answer : third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol

explanation :

let us write down the given equations

equation 1 :

equation 2 :

equation 3 :

let us use hess's law to find out which 2 equations can be added to get the third equation.

let us reverse equation 2 and multiply it by 2. the new equation that we get is,

equation 4 :

let us add equation 1 & 4

the above equation is similar to equation 3 but has different value for dhrxn.

therefore third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol