Temperature conversions between rare and historical scales like Delisle (°De) and Réaumur (°Ré) may not be commonly discussed today, but they hold significant importance in the history of science and in niche academic studies. This article provides a step-by-step guide to converting 3.3 degrees Delisle (°De) into degrees Réaumur (°Ré), along with the formulas, explanations, and real-world relevance.
🌡️ Temperature Scales
Before jumping into the conversion, it’s essential to understand the scales themselves.
1. The Delisle Scale (°De)
- Invented in 1732 by Joseph-Nicolas Delisle, a French astronomer.
- Unlike Celsius, the Delisle scale decreases as the temperature increases.
- On this scale:
- 0°De = 100°C (boiling point of water)
- 150°De = 0°C (freezing point of water)
This makes the Delisle scale an inverted system, which can sometimes confuse students and researchers.
2. The Réaumur Scale (°Ré)
- Introduced by René Antoine Ferchault de Réaumur in 1731.
- It was once widely used in Europe, especially for industrial, brewing, and cheesemaking applications.
- On this scale:
- 0°Ré = 0°C (freezing point of water)
- 80°Ré = 100°C (boiling point of water)
The Réaumur scale is more straightforward compared to Delisle, but it has largely been replaced by Celsius and Kelvin in modern science.
🔢 Conversion Formulas You Need
To convert from Delisle (°De) to Réaumur (°Ré), we follow a two-step method:
- Convert Delisle to Celsius: °C=100−(23×°De)°C = 100 – \left( \frac{2}{3} \times °De \right)°C=100−(32×°De)
- Convert Celsius to Réaumur: °Reˊ=°C×45°Ré = °C \times \frac{4}{5}°Reˊ=°C×54
🧮 Step-by-Step Conversion: 3.3°De to °Ré
Step 1: Convert 3.3°De to Celsius
°C=100−(23×3.3)°C = 100 – \left( \frac{2}{3} \times 3.3 \right)°C=100−(32×3.3) °C=100−2.2=97.8°C°C = 100 – 2.2 = 97.8°C°C=100−2.2=97.8°C
Step 2: Convert Celsius to Réaumur
°Reˊ=97.8×45°Ré = 97.8 \times \frac{4}{5}°Reˊ=97.8×54 °Reˊ=78.24°Reˊ°Ré = 78.24°Ré°Reˊ=78.24°Reˊ
✅ Final Answer:
3.3°De (Delisle) = 78.24°Ré (Réaumur)
📊 Quick Reference Conversion Table (Near 3.3°De)
| Delisle (°De) | Celsius (°C) | Réaumur (°Ré) |
|---|---|---|
| 0 | 100 | 80 |
| 1 | 99.33 | 79.46 |
| 2 | 98.67 | 78.94 |
| 3 | 98.00 | 78.40 |
| 3.3 | 97.80 | 78.24 |
| 4 | 97.33 | 77.86 |
| 5 | 96.67 | 77.34 |
🔍 Why This Conversion Matters
Even though the Delisle and Réaumur scales are rarely used today, their study is important for:
- Historical science research – Early scientific papers often mention these scales.
- Restoration of old equipment – Antique thermometers may use these units.
- Education and curiosity – Students learning about the evolution of temperature scales.
🌐 SEO Keywords to Remember
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📝 Conclusion
Converting 3.3°De (Delisle) into Réaumur gives us 78.24°Ré. While both scales are largely obsolete today, they reflect the fascinating history of scientific measurement. Understanding these conversions not only sharpens mathematical skills but also connects us with the legacy of early scientific exploration.