I have a question about a mixing rule! Multiple choice
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During the preliminary design phase of the gas generation process in a certain ammonia synthesis plant, it is necessary to determine the average specific heat capacity of the process gas at the outlet of the gasifier. After obtaining the specific heat values [kJ/(Nm3·℃)] for each component of the process gas at that temperature, which mixing rule should be used to calculate the specific heat capacity of the resulting mixed process gas? A. The sum of the products of the specific heat capacities of each component in the process gas and their molar fractions B. The sum of the products of the specific heat capacities of each component in the process gas and their volume fractions under standard conditions C. The sum of the products of the specific heat capacities of each component and their weight mass fractions in the process gas D. The sum of the products of the specific heat capacities of each component and their volume fractions under the operating conditions of the process gas
AB, the unit of specific heat capacity is defined under standard conditions; therefore, the volume must also be converted to standard conditions as well. Only by multiplying them can the Nm3 unit be eliminated
I also choose Abd; essentially, it’s equivalent to a unit of mole – it can be moles, NM3, or M3