A Sample Calculation

Table 5.1 gives a sample calculation of the NHVj for toluene, starting from the molar enthalpies of formation of the reactants and products and the enthalpies of changes in state as the case requires. 

See the American Institute of Chemical Engineers classifier test procedure for a sample calculation of classifier selectivity. This example is plotted in Fig. 20-14. 

A certain Geiger counter is known to respond to only 1 of every 1000 radiation events from a sample. Calculate the activity of each radioactive source in curies, given the following data (a) 591 clicks in 100. s (b) 2.7 X 104 clicks in 1.5 h ... 

All the stream flows, tabulated, were multiplied by this factor and are shown on the flowsheet, Figure 4.2. A sample calculation is given below ... 

As a sample calculation, we could estimate how hot the cast might possibly get if the temperature when the doctor applied the cast were initially 25°C. The cast would be the hottest if none of the heat from the cast-formation reaction were lost to the surroundings. All of the heat released by the reaction would be used to heat the products. As an approximation, the reaction could be assumed to occur completely with pressure remaining constant with both temperature-independent A// tn and heat capacity values. No actual weight of cast is needed for the calculation. 

D. Show the mathematical formulas utilized for all calculations and also a sample calculation. 

Record in your notebook at least a sample calculation for each of these standardizations and all... 

Record the buret readings at the end points for all three beakers. Calculate the percent KHP in the sample for all three titrations and include at least a sample calculation in your notebook, along with all results and the average. Calculate the ppt relative standard deviation. If your three results do not agree to within 10.0 ppt relative standard deviation, repeat until you have three that do or until you have a precision satisfactory to you instructor. 

We have used these average differences between potassium and ammonium salt solutions and between sodium and ammonium salt solutions to calculate average values of salting-out coefficients for the four gases in ammonium salts from determinations on salts with the same anion but different cations. A sample calculation from data on ammonia in bromide solutions is shown in Table VI. 

A sample calculation has been made to illustrate the practical application of the PFGC-MES equation of state. 

The same formulas apply to C6D6 with the replacement of aH with aD and PH with PD. The results of a sample calculation are shown in Tables 6.1 and 6.2. 

It takes 300 iterations to converge a 3-D simulation of the five-channel cross-flow geometry (i.e., 224 000 cells). Figure 43 shows a sample calculation of the polarization behavior of the co-flow cell. 

Note that in the present case the matrix elements depend on the final density p . Moreover, because this density is obtained from the transformed wavefunction, they also depend on the expansion coefficients. For this reason, Eq. (177) must be solved iteratively. Such a procedure has been applied - in a sample calculation - to the 2 S excited state of the helium atom. The upper-bound character of the energy corresponding to the energy functional for the transformed wavefunction [ p( r,- ) with respect to the exact energy is guaranteed by... 

A sample calculation for growth of a second phase in a matrix phase (i.e., the growth of ferrite in austenite) would take the following procedure. The flux balance equation at the moving phase interface is formulated as... 

The term f x D is only the result of an algebraic manipulation, and no interpretation should be assumed. This term f x D is the contribution to cash flow from depreciation, and (1 — t) x i and (1 — f) X C are the contributions to cash flow from revenues and cash operating expenses, respectively. Example 7 is a sample calculation of the after-tax cash flow and the tabulated results. 

A sample calculation of the after-tax weighted cost of capital is found in Table 9-8. Each debt item is divided by the total debt, and... 

The grams of oxygen needed to completely combust one gram of a given fuel can be calculated from the balanced chemical equa tion. Table 3.5 lists the oxygen requirement for a variety of organic fuels. A sample calculation is shown in Figure 3.1. 

A sample calculation was given in Ref 29b for shock waves in air employing the general equation of state (See eq 23) for the expln products and the ideal gas adiabatic eq of state for air. Employing the method of calculation based on the hydrodynamic theory, good agreement was obtd for expls investigated (PETN Tetryl) between calculated and experimentally detd explosive properties... 

Determination of Aluminum. Weigh accurately a sample calculated to contain 0.4g of TNT into a tared sintered glass filtering crucible, medium porosity, 30-ml capacity. Extract on a Fisher filtrator with ethylene chloride (purified... 

Alternate Method of Analysis. Grade A 4.4.3.3.1 Determination of RDX + Nitrocellulose. Weigh accurately a sample calculated to contain between 0.35 and 0.40g of TNT into a tared 100-ml beaker. Add 20ml of RDX saturated benzene to the beaker. The prepn of the RDX saturated benzene is described in 4.4.3.5.5. Cover beaker with a watch glass and place on a steam bath for 30 mins, swirl soln frequently. (An oscillating hot... 

The van der Waals parameters are calculated from atom and bond contributions provided by Moriguchi et al. [40] who give a sample calculation for bromopropane. 

For a sample calculation, a 30-mg sample was found to have 30.1% uronic acid content (UNITE3.3). Therefore, it had 9.03 mg or 0.051 mmol uronic acid. (The molecular weight or uronic acid is 176 g/mol.) The amount of methanol in this sample, as calculated from the standard curve, was 1.2 mg/ml. Therefore, in 1 ml of sample in isopropanol/NaOH, there would be 1.2 mg or 0.0375 mmol methanol. (The molecular weight of methanol is 32.04 g/mol.) Therefore, the degree of methylation = (0.0375/0.051) x 100 - 74%. 

When the mass m of an object is relatively large, as is true in daily life, then both Ax and Av in the Heisenberg relationship can be very small. We therefore have no apparent problem in measuring both position and velocity for visible objects. The problem arises only on the atomic scale. Worked Example 5.6 gives a sample calculation. 

Still other applications of the ideal gas law make it possible to calculate such properties as density and molar mass. Densities are calculated by weighing a known volume of a gas at a known temperature and pressure, as shown in Figure 9.10. Using the ideal gas law to find the volume at STP and then dividing the measured mass by the volume gives the density at STP. Worked Example 9.7 gives a sample calculation. 

A sample calculation using these conditions is shown in Figure 26. B + was implanted (1 X 1015/cm2 and 50 keV) and annealed by RTA at 1150 °C for 10 s. Then Si+ was implanted to create an amorphous layer, and the RTA cycle was repeated. These data were compared with a B profile obtained with no Si+ implant but with the same heat treatment. The enhanced diffusion of B was calculated by using equation 52, and good agreement was achieved. This model has been verified for RTA and furnace anneals at temperatures as low as 750 °C. 

We perform here a sample calculation to show that Eq. (6.9)... 

With all inputs known, the tail-gas stream is re-determined and the calculation repeated until suitable accuracy is obtained. Two iterations proved quite sufficient. The final results are presented in Section 7.4, and a sample calculation is detailed as follows. 

A sample calculation of the Henry s law reference activity coefficients is... 

Calculate the S02 content of your raisin sample in each test tube. Record it on your Report Sheet (5). Here is a sample calculation for test tube no. 2 ... 

A sample calculation for a generic polyester carbonate (Figure 16.7) [29] with corresponding group contributions (Table 16.2) illustrates how the deterministic and statistical models were used to screen for flammability. 

A sample calculation (using Table 2.12) for Type I, Class A glass is as follows ... 

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