Oxygen heat capacity ratio

Normally, when sulfur is oxidized, the product is S02, but S03 may also be formed. When 0.6192 g of sulfur was burned, by using ultrapure oxygen in a bomb calorimeter with a heat capacity of 5.270 kJ-(°C) 1, the temperature rose 1.140°C. Assuming that all the sulfur was consumed in the reaction, what was the ratio of sulfur dioxide to sulfur trioxide produced ... 

The heat capacity of a sample of thorinm dicarbide was measnred by adiabatic calorimetry from 5 to 350 K and was found to be of normal sigmoid shape without transitions or thermal anomalies. The sample was a composite of seven different samples, prepared from the elements and annealed at 5 h at 2273 K, crashed and reheated to above 2273 K for a further 5 h to obtain a sample of uniform composition. The C/Th ratio was analysed to be (1.98 + 0.03), the major impurity being 0.79 wt% carbon, for which the heat capacities were corrected. There is no mention of oxygen contamination or analysis. At 298.15 K, the values of C for ThQ 9s and (5 ° (298.15 K) - (0 K))... 

Crawford concluded that the specific heat ( capacity for containing heat ) of dephlogisticated air (oxygen) is 4 6 times that of common air. He also concluded that the capacities of bodies for containing heat are diminished by the addition of phlogiston, and increased by the separation of this principle . The ratios of the specific heats of the calces (oxides) of metals to those of the metals were found to be (calx metal) tin, 14-7 10 4, iron 8 3 1, lead 19 9 14 7, antimony ii-6 4-5. 

Since we know that the efficiency is about 0.7, we can use equation 9.10 to find the power. The exit gas is not normal air it has extra water vapour, and less oxygen, and so the specific heat capacity will have changed, as will y, the ratio of the specific heat capacities. In engines, standard values used are 1150Jkg K for Cp and 1.33 for y (e.g. Stone, 1999). In this case the change in gas composition is not so great, so we will use 1100 Jkg for Cp and y = 1.38. The constant (y — 1/y) thus becomes 0.275 Ti is 363 K, so equation 9.10 becomes... 

In order to reduce the explosion temperature, complements or additives are generally added into the explosive. These additives can change the ratio between oxygen and combustible elements to cause incomplete oxidation products and thus to reduce the formation heat of explosion products. Some additives are not involved in the explosion reaction and only increase the total thermal capacity of explosion products. 

The pure compound capacity accounts for the amount of charge that can be released by the fuel, it is independent of E° and proportional to the ratio njM. Therefore exhibits the same trend as E p. The theoretical energy conversion efficiency is the ratio between the reversible (maximum) electric work that can be obtained by electrochemical oxidation of the fuel and the heat released by direct combustion with oxygen, that is ... 

The capacities of arterial to venous blood were in the ratio 1 10 and the blood in its progress thro the system gives out the heat which it had received from the air in the lungs . In respiration the absolute heat in the pure air (oxygen) is also decreased. In combustion no part of the heat can be derived from the combustible body. . . [but] depends upon the separation of absolute heat from the air by the action of phlogiston . ... 

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