3-Disintegration of calcined samples was carried out more quickly due to the dehydration process.NomenculatureE- Activation Energy, kJ mol-1K -Rate Constant, s-1ko- Frequency Factor, s-1n- Reaction OrderQ- Heating Rate, K s-1R-
Universal Gas Constant, 8.314 J.mol-1 K-1T- Absolute Temperature, Kx- Fraction Reacted
The universal gas constant has a value of [R.sub.u] = 8314.472 J/(kg * K) with an uncertainty of 2 X [10.sup.-6] [17].
The universal gas constant has a value of [R.sub.u] = 8314.472 J/(kg * K) with a relative uncertainty of 2 X [10.sup.-6] [17].
(3) are necessary: pressure, temperature, compressibility, the
universal gas constant, and molecular weight.
where [m.sub.g] is the mass of gas phase, R is the gas constant (equal to the
universal gas constant divided by the molecular weight of the gas), T is the absolute temperature, and [P.sub.g] is the pressure of the gas phase.
"virial coefficients." Here, p denotes pressure, v the molar volume, T the absolute temperature, and R the
universal gas constant. Mason and Spurling noted the special importance of the virial equation of state because of its sound theoretical foundation (21).
where R is the
universal gas constant, the rest parameters have their above-mentioned meanings.
where [Mathematical Expression Omitted] is the initial bubble pressure, [Z.sub.2] the compressibility factor of the gas inside the bubble, T temperature, and R
universal gas constant.
where [n.sub.b] is the mole number of the gas in the bubble, R is the
universal gas constant, T is the absolute temperature of the system, [P.sub.b] is the gas pressure inside the bubble, [P.sub.s] is the saturation pressure, A is the interfacial area, [Gamma] is the interfacial energy between liquid and gas, [P.sub.o] is the environmental pressure, and [V.sub.b] is the volume of the bubble.
where [k.sub.0], U, and A are parameters specific to the polymer, while R is the
universal gas constant. The first term In Eq 2 represents a contribution due to diffusion, while the second term represents the thermodynamic driving force.