The energy difference between cis- and trans-but-2-ene is about 4 kJ. mol; however, the trans isomer of 4,4-dimethylpent-2-ene is nearly 16 kJ. mol more stable that the cis isomer. Why?

sry but any answer choices

i think it is true since you can test the answer and can use observations to complete it.

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