The following table provides information about three organic compounds, X, Y and Z - VCE - SSCE Chemistry - Question 16 - 2020 - Paper 1
Question 16
The following table provides information about three organic compounds, X, Y and Z.
Compound
X
Structural formula
H H
H - C - C - H
H H
Molar mass (... show full transcript
Worked Solution & Example Answer:The following table provides information about three organic compounds, X, Y and Z - VCE - SSCE Chemistry - Question 16 - 2020 - Paper 1
Step 1
Identify the pattern in boiling points
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Answer
To determine the boiling point of compound Z, we first observe the boiling points of compounds X and Y. Compound X has a boiling point of 97 °C, while compound Y has a boiling point of 118 °C.
Step 2
Analyze the structural formulas
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Answer
Both compounds X and Y have similar structural formulas, differing only by the presence of an -O- group in compound Y. This suggests that the addition of oxygen increases the boiling point.
Step 3
Estimate the boiling point of compound Z
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Answer
Compound Z has a structural formula that also includes an -O- group, similar to compound Y. Therefore, we can infer that its boiling point should be approximately between that of compounds X and Y. Since compound Y has a boiling point of 118 °C, compound Z's boiling point is likely lower. Among the options, the closest estimate that falls below 118 °C is 101 °C.
Step 4
Conclusion
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Answer
Thus, the best estimate for the boiling point of Compound Z is B. 101 °C.
