Reference no: EM132787120 , Length: 232 words

Question - Preparing a plot of heat of solution

Data from the Bureau of Standards (J. Phys. Chem. Ref. Data, vol. 11, suppl. 2, 1982) include the following heats of formation for 1 mol of CaCl₂ in water at 25^oC:

CaCl₂ in 10 mol H₂O -862.74 kJ

CaCl₂ in 15 mol H₂O -867.85 kJ

CaCl₂ in 20 mol H₂O -870.06 kJ

CaCl₂ in 25 mol H₂O -871.07 kJ

CaCl₂ in 50 mol H₂O -872.91 kJ

CaCl₂ in 100 mol H₂O -873.82 kJ

CaCl₂ in 300 mol H₂O -874.79 kJ

CaCl₂ in 500 mol H₂O -875.13 kJ

CaCl₂ in 1000 mol H₂O -875.54 kJ

From these data prepare a plot of (ΔH)^~, the heat of solution at 25^oC of CaCl₂ in water, vs. n^~, the mole ratio of water to CaCl₂.