Which of the following is an example of industrial water use?

Hello. This question is incomplete. The full question is:

" Which of the following is an example of industrial water use?

- water are used to refine oil  - water used to flush the toilet  - water used to irrigate farms  - water used to take a bath"

Water are used to refine oil  

Explanation:

Oil refineries are generally found in coastal areas near the mouth of a river, both to take advantage of water resources and to improve transportation cost structures. In other words, when oil is refined, water is used industrially. In the United States, refineries are concentrated along the Gulf of Mexico and the West Coast, with California and Texas as the main players. But the state's heavy refining regions are arid. Providing fresh water for operations in these dry areas can be challenging, which makes water reuse a natural fit for the industry.

1.solid

2.carbon dioxide

3.helium

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