Use the data to calculate the slope of the calcite-aragonite phase boundary (at 298K). Use this information to sketch the phase diagram of calcium carbonate.

AjH (kJ) AG (kJ) S (J/K) Cp (J/K) V (cm) 0 0 28.33 24.35 9.99 -2594.29 -2443.88 83.81 121.71 44.09 -2590.27 -2442.66 93.22 122.72 51.53 -2587.76 -2440.99 96.11 124.52 49.90 0 0 154.84 20.79 5.30 3.42 Substance (form) Al(s) Al SiO3 (kyanite) Al2SiO3 (andalusite) Al2SiOs (sillimanite) Ar (8) C (graphite) C (diamond) CH4 (g) C2H6 (g) C3Hg (g) C2H5OH (1) C6H12O6 (glucose) CO (8) CO2 (g) H2CO3 (aq) HCO3 (aq) Ca2+ (aq) CaCO3 (calcite) CaCO3 (aragonite) CaCl2 (s) 0 1.895 --74.81 -84.68 -103.85 -277.69 -1273 -110.53 -393.51 --699.65 -691.99 0 2.900 - 50.72 -32.82 - 23.49 -174.78 -910 -137.17 -394.36 -623.08 --586.77 5.74 2.38 186.26 229.60 269.91 160.7 212 197.67 213.74 187.4 91.2 8.53 6.11 35.31 52.63 73.5 111.46 115 29.14 37.11 58.4 -542.83 -1206.9 -1207.1 --795.8 -553.58 -1128.8 -1127.8 ---748.1 --53.1 92.9 88.7 104.6 81.88 81.25 72.59 36.93 34.15 51.6