Extreme weather e.g. snow and cold weather. Another main contributing factor is that many places have a long dry season.
i think the answer is C3H8O
The best answer to your question would be B:those who could not be broken down by physical means.
Answer : The correct option is, (b) +115 J/mol.K
Explanation :
Formula used :

where,
= change in entropy
= change in enthalpy of vaporization = 40.5 kJ/mol
= boiling point temperature = 352 K
Now put all the given values in the above formula, we get:



Therefore, the standard entropy of vaporization of ethanol at its boiling point is +115 J/mol.K
varying composition is not a property of a pure substance