Consider the given 1H NMR spectrum, including TMS as reference, of a compound with a formula of C 9 H 11 B r O . Proton NMR spectrum with single TMS peak at 0 ppm, quintet centered around 2 ppm, a triplet at 3.15 ppm, a triplet at 3.65 ppm, two complex peaks around 7 ppm, and a triplet at 7.3 ppm. A closer view of the upfield signals is also available. Close up view of the proton NMR clearly showing quintet near 2 ppm, triplet at 3.15 ppm, and triplet at 3.65 ppm. What is the structure of the compound

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.