Calcium oxide heat capacity

Brunauer and co-workers [129, 130] found values of of 1310, 1180, and 386 ergs/cm for CaO, Ca(OH)2 and tobermorite (a calcium silicate hydrate). Jura and Garland [131] reported a value of 1040 ergs/cm for magnesium oxide. Patterson and coworkers [132] used fractionated sodium chloride particles prepared by a volatilization method to find that the surface contribution to the low-temperature heat capacity varied approximately in proportion to the area determined by gas adsorption. Questions of equilibrium arise in these and adsorption studies on finely divided surfaces as discussed in Section X-3. 

Preparation of carbon monoxide from formic acid 50e A round-bottomed flask (capacity 1 1) is fitted by ground-glass joints with a dropping funnel and a gas-outlet tube, filled two-thirds full with concentrated phosphoric acid, and heated in a water-bath to 80° then formic acid is dropped in slowly. For removal of impurities (carbon dioxide, air, acid vapors, water vapor), the carbon monoxide evolved is passed successively through 50% potassium hydroxide solution and an alkaline solution of sodium dithionate (25 g of dithionate in 125 ml of water containing also 20 ml of 70% potassium hydroxide solution) and over potassium hydroxide, calcium chloride, and phosphoric oxide. 

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