A team of engineers has decided to design a new shoe for people suffering from a painful foot condition. Which of the following tasks should the team undertake during the process of researching
the condition?

A. Consult with an orthopedist about how to best accommodate potential consumers in
terms of physical comfort and pain alleviation,
B. Test the shoe in a trial.
C. Find a rubber manufacturer to design the sole of the new shoe.
D. Determine how much potential consumers would be willing to pay for this new product.

14,16 18 reacts with group

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.

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