Sodium chloride specific heat

The excess heat of solution of sample A of finely divided sodium chloride is 18 cal/g, and that of sample B is 12 cal/g. The area is estimated by making a microscopic count of the number of particles in a known weight of sample, and it is found that sample A contains 22 times more particles per gram than does sample B. Are the specific surface energies the same for the two samples If not, calculate their ratio. 

Operational Characteristics. Oxygen generation from chlorate candles is exothermic and management of the heat released is a function of design of the total unit iato which the candle is iacorporated. Because of the low heat content of the evolved gas, the gas exit temperature usually is less than ca 93°C. Some of the heat is taken up within the candle mass by specific heat or heat of fusion of the sodium chloride. The reacted candle mass continues to evolve heat after reaction ends. The heat release duting reaction is primarily a function of the fuel type and content, but averages 3.7 MJ/m (100 Btu/fT) of evolved oxygen at STP for 4—8 wt % iron compositions. 

Figure 12.3 Density and specific heat capacity (a) Sodium chloride, (b) Calcium chloride...

References are appended to investigations of the properties of dilute aqueous solutions of sodium chloride, including the molecular depression of the freezing-point8 and elevation of the boiling-point,9 vapour-pressure,10 density,11 viscosity,12 refractive index,13 specific heat,14 diffu-... 

SAFETY PROFILE Varies widely, Sodium chloride (table salt) has very low toxicity, while carbonyl chloride (phosgene) is lethal in small doses. Therefore, see specific entries. When heated to decomposition or on contact with acids or acid fumes, they evolve highly toxic chloride fumes. Some organic chlorides decompose to yield phosgene. 

Sodium is a light soft ductile metal of 0.97 specific gravity, which melts at 97.6 C. (208 F.) and boils at 760 C. (1382 ). It is obtaim d by the electrolysis of molten sodium chloride (common salt). On contact w ith water, sodium decomposes it with vigorous evolution of hydrogen. The heat of reaction is sufficient to ignite the hydrogen ami, heni c, in the presence of moisture, sodium is spontaneously inflammable. 

If the atomic frequency v has any real physical significance it should be possible to calculate it from various other physical properties. Thus Nemst supposed that the frequency of a body composed of electrically charged ions could be calculated from its optical properties. In agreement vdth this hypothesis he found that the frequencies of the ultra-red absorption bands of potassium and sodium chloride determined by Rubens were approximately equal to the values of v calculated from the specific heat. It is probable, however, that this agreement is purely accidental. 

Use Table 1 to determine the specific heat of sodium chloride. 

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