Although ethyl bromide and isobutyl bromide are both primary halides, ethyl bromide undergoes sn2 reactions more than 10 times faster than isobutyl bromide does. when each compound is treated with a strong base/nucleophile (eto7), isobutyl bromide gives a greater yield of elimination products than substitution products, whereas with ethyl bromide this behavior is reversed. what factor accounts for these results?

gas

explanation:

smoke is the matter of a gas

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