Question When completely combusted in oxygen, compounds containing only C, H and O are converted only to CO2 and H2O.

How many moles of H2O are formed when 2 moles of CH3CH2OH are completely combusted in oxygen?

in the analysis of systems that involve fluid flow, we frequently encounter the combination of properties u and pv.

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

it has both hydrogen and oxygen