Question detail
What is the significance of using significant figures in enthalpy calculations?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Energetics
Question
- A. To ensure accuracy in measurements
- B. To simplify calculations
- C. To increase the number of decimal places
- D. To make calculations easier
Answer
To ensure accuracy in measurements
Explanation
Using significant figures in enthalpy calculations is crucial for ensuring accuracy in measurements. It reflects the precision of the data collected and helps maintain the integrity of the results.
Common mistake
Incorrect Unit Conversion
Students often forget to convert the volume from cm³ to dm³ when calculating molar enthalpy changes using calorimetry data.
Always convert the volume to dm³ before using the formula for molar enthalpy change. For example, if the volume is 500 cm³, convert it to dm³ by dividing by 1000. Then use the formula: ΔH = q / n, where q is the heat energy transferred and n is the number of moles calculated from the mass and molar mass.
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