Problem 6.5: Oxygen solubility is approximately 83 mgL at

From Chapter 6 Problem Set. Level 2: Applied Thinking.

Question

Oxygen solubility is approximately 8.3 mg/L at 77°F and 4.4 mg/L at 140°F. Assuming linear behavior, estimate the solubility at 100°F. (Note: actual solubility follows a curve - this question uses linear approximation for simplicity.)

Answer

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Linear interpolation: 100°F is 23/63 of the way from 77°F to 140°F. Δ = 8.3 − 4.4 = 3.9 mg/L. Decrease: 3.9 × (23/63) = 1.4 mg/L. Estimated DO at 100°F ≈ 8.3 − 1.4 = 6.9 mg/L.