Which is the most accurate description of compounds?
2 answers:
Answer: Option (d) is the correct answer.
Explanation:
A compound is defined as the substance in which only different atoms chemically combine together in a fixed ratio by mass.
For example, NaCl, HCl, , etc are all compounds.
Compounds are also pure substances like elements as they can be broken down into their constituent particles.
Whereas substances that are made up of only one type of atom are known as elements.
Thus, we can conclude that the most accurate description of compounds is that they are made up of atoms of 2 or more elements that are chemically combined.
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H₂S
<h3>Further explanation</h3>Given
ΔH fusion and ΔH vaporization of different substances
Required
The substance absorbs 58.16 kJ of energy when 3.11 mol vaporizes
Solution
We can use the formula :
Q=heat/energy absorbed
n = moles
The heat absorbed : 58.16 kJ
moles = 3.11
so ΔH vaporization :
The correct substance which has ΔH vaporization = 18.7 kj / mol is H₂S
(H₂S from the data above has ΔH fusion = 2.37 kj / mol and ΔH vaporization = 18.7 kj / mol)