An unknown compound X has the molecular formula C6H14O. Compound X shows a strong peak in its IR spectrum at 3000 cm-1. The 1H NMR spectral data of compound X is given below. What is the structure of compound X

CH3CH2CH2CH2CH2CH2OH  -  HEXAN-1-OL

Explanation:

Considering the H-NMR spectrum file attached, there a peak up field at around 3.5 and other peaks appear down-field around 1.5 downward. This shows that the hydrogen attached to the Oxygen is distinctly separated from other hydrogen atoms, meaning that it is attached to the terminal carbon.

Also, the IR data given also buttress the point.  

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.