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Thando GXUMISA

Thando G.

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Viewed Questions

Solve for n. $$\left(\begin{array}{c}n+2 \\4\end{array}\right)=6 \cdot\left(\begin{array}{l}n \\2\end{array}\right)$$

Solve for n. $$\left(\begin{array}{c}n+2 \\4\end{array}\right)=6 \cdot\left(\begin{array}{l}n \\2\end{array}\right)$$

Algebra and Trigonometry

Sequences, Series, and Combinatorics

Combinatorics: Combinations

Questions asked

INSTANT ANSWER

The normal boiling point temperature for methanol is 65 Deg C , and its critical temperature and pressure given in reference books ar 239.6 Deg C and 8097 kPa respectively. Estimate the latent heat of vaporization of methanol at 200 Deg C using Watson’s equation.

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INSTANT ANSWER

An ideal gas, Cp = (7/2)R, is heated in a steady-flow heat exchanger from 343.15 K to 463.15 K (70°C to 190°C) by another stream of the same ideal gas which enters at 593.15 K (320°C). The flow rates of the two streams are the same, and heat losses from the exchanger are negligible. (a) What is ∆Stotal in each case?

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INSTANT ANSWER

An ideal gas, Cp = (7/2)R, is heated in a steady-flow heat exchanger from 343.15 K to 463.15 K (70°C to 190°C) by another stream of the same ideal gas which enters at 593.15 K (320°C). The flow rates of the two streams are the same, and heat losses from the exchanger are negligible. (a) Calculate the molar entropy changes of the two gas streams in the exchanger.

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ANSWERED

Oluwadamilola Ameobi verified

Numerade educator

You are instructed to investigate the tank, where 10% by weight NaOH solution is used for caustic washing process. Your first observation records that to reduce the ocillations in flowrate and concentration, a 30 m^3 tank is used as a surge tank. Steady state flow values as follows: V= 15m^3, f1=f2= 9.3m^3/h, c1=10% abd c2=10.75% and the density is 1055kg/m^3 Develop mathametical equations that describe system?

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INSTANT ANSWER

Identify the parts of speech acts that are reflected in the sentence Hooray! My teelam has won!

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ANSWERED

Narayan Hari verified

Numerade educator

A reciprocating compressor has a pressure ratio of 9. The clearance volume of the compressor is 8 percent of the total volume(v1). The compression and expansion index is 1.31 and 1.35. What is the volumetric efficiency?

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ANSWERED

Oluwapelumi Kolawole verified

Numerade educator

Do you think that the volatility of a substance depends on its diffusivity? Explain?

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INSTANT ANSWER

10:49 (?? w] Tutorial 3 Chapter 3 (1) - Saved Tutorial 3 Question 1 Reported values for the virial coefficients of isopropanol vapor at \( 200^{\circ} \mathrm{C} \) are: \( \mathrm{B}=-388 \mathrm{~cm}^{3} / \mathrm{mol} \) and \( \mathrm{C}=-26000 \mathrm{~cm}^{6} / \mathrm{mol}^{2} \). Calculate \( \mathrm{V} \) and \( \mathrm{Z} \) for isopropanol vapor at \( 200{ }^{\circ} \mathrm{C} \) and 10 bar by (1) the ideal gas equation; (2) two-term virial equation; (3) three-term virial equation. Question 2 Determine the molar volume of n-butane at \( 510 \mathrm{~K} \) and 25 bar by, (1) the ideal-ga equation; (2) the generalized compressibility-factor correlation; (3) the generaliz virial-coefficient correlation. Question 3 A mass of \( 500 \mathrm{~g} \) of gases ammonia is contained in a \( 30000 \mathrm{~cm}^{3} \) vessel immers a constant-temperature bath at \( 65^{\circ} \mathrm{C} \). Calculate the pressure of the gas by (1) tl ideal-gas equation; (2) a generalized correlation . Question 4 Propane is stored in a container initially at \( 405 \mathrm{~K} \) and 107 bar. The volume of th vessel is 48 Litres. After a leak, the temperature and pressure is measured and \( \mathrm{f} \) to be \( 405 \mathrm{~K} \) and \( 32 \mathrm{bar} \). Calculate the mass of the propane fluid lost due to the \( \mathrm{l} \) kilograms. The molecular weight of propane us \( 44.1 \mathrm{~g} / \mathrm{mol} \). Question 5 Liquid acetone is at \( 20^{\circ} \mathrm{C} \) and 1 bar. Its volumetric properties at these conditions are as follows: \( \beta=1.487 \times 10^{-3} \quad{ }^{0} C^{-1} \quad \kappa=62 \times 10^{-6} \mathrm{bar}^{-1} \quad V=1.287 \mathrm{~cm}^{3} / \mathrm{g} \) Determine the following for acetone: The value of \( \left(\frac{\partial P}{\partial T}\right)_{V} \), the pressure generated by heating at constant volume from \( 20^{\circ} \mathrm{C} \) and 1 bar to \( 30^{\circ} \mathrm{C} \), the change in volume when conditions change from \( 20^{\circ} \mathrm{C} \) and 1 bar to \( 0^{\circ} \mathrm{C} \) and 10 bar.

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ANSWERED

Anna D. verified

Numerade educator

Propane is stored in a container initiallt at 405k and 107bar Tge volume of tge vessel is 48L. After a leak, the temperature and pressure is measured and found to be 405k and 32bar. Calculate the mass of the propane fluid lost due to the leak in kilograms. The molecular weight of propane is 44.1g/mol

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ANSWERED

Luke Humphrey verified

Numerade educator

Number of n-moles in an isothermal process theory

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