What is the product of (structural formula):
methyl acrylate ch2=chcooch3 with hcl
methyl acrylate with h2/pt

Structural formula of reactions is in the picture

Explanation:

The reaction of a alkene with HCl is called "alkene hydrohalogenation". The alkene "attacks" hydrogen. The hydrogen occurs following Markovnikov rule:

" Hydrogen takes place at the less substituted carbon atom of the double bond".

Then, Cl⁻ attacks the other position of the initial double bond giving as result the blue structure,

The second reaction is the alkene hydrogenation that gives as result the respective alkane (Red structure).

I hope it helps!

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