The malonic ester synthesis is a method for preparing carboxylic acids from alkyl halides. For each of the following carboxylic acid products, draw the structure of the alkyl bromide that would be used in its synthesis. 1. Diethyl malonate,
NaOC2H5, C2H5OH
2. NaOH, H2O
3. H3O+, heat
>
1. Diethyl malonate,
NaOC2H5, C2H5OH
2. NaOH, H2O
3. H3O+, heat
>
1. Diethyl malonate,
NaOC2H5, C2H5OH
2. NaOH, H2O
3. H3O+, heat
>

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

the correct answer would be b) volume versus temperature, because they are also directly proportional.