Question

Estimate the fugacity of the steam in 340 deg. C and 14000 kPa use
table Lee_Kesler and compare the result with the calculation using
the steam table

Answer #1

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CALCULATE THE FUGACITY COEFFICIENT OF TOLUENE AT 50 °C
& 25 KPA USING THE VIRIAL EQUATION OF STATE TRUNCATED AFTER THE
SECOND TERM. SUCH AN EQUATION OF STATE IS GIVEN BY THE FOLLOWING
EXPRESSION: Z=1+ (BP/RT), WHERE THE SECOND VIRIAL COEFFICIENT (B)
FOR TOLUENE IS -1,860 CM3/MOL.

Estimate the fugacity of cyclopentane at 110 C and 275 bar. At
110 C the vapor pressure of cyclopentane is 5.267 bar.
This question was solved in chegg. the author used
Normal boiling point (Tn) to calculate the
reduced temperature (Tnr) and then to find the
Saturation volume (Vsat). why didn't he use the
given temperature (110 C) instead ?

Complete the following table for H2O. Use data from the steam
tables.
Given T=300 degrees Celsius and v=0.14 m^3/kg what will the
pressure P in kPa be?

A 0.1 m3 pressurised cooking pot operates at 250 kPa. Upon
reaching the pressure, a valve opens to let out steam (controlled
leak) at that pressure as a safety precaution. During a cooking
session, the valve was open for 10 mins during which time the
amount of liquid in the pot decreased by 0.0003 m3. The valve has a
radius of 2.15 mm. Saturation conditions can be assumed to exist in
the vessel. Determine the following: a. Using the appropriate...

Create a table of values for the function and use the result to
estimate the limit. Use a graphing utility to graph the function to
confirm your result. (Round your answers to four decimal places. If
an answer does not exist, enter DNE.)
lim x→0
sin 5x
x
x
-0.1
-0.01
-0.001
0.001
0.01
0.1
lim x→0
sin 5x
x
≈

(a) Compute the derivative of the speed of sound in air with
respect to the absolute temperature, and show that the
differentials dv and dT obey dv/v = 1/2 dT/T. (b) Use this result
to estimate the percentage change in the speed of sound when the
temperature changes from 0�C to 24.8�C. (c) If the speed of sound
is 332 m/s at 0�C, estimate its value at 24.8�C using the
differential approximation. (d) How does this approximation compare
with the...

The table gives the values of a function obtained from an
experiment. Use them to estimate
9
f(x)
dx
3
using three equal subintervals with right endpoints, left
endpoints, and midpoints.
x
3
4
5
6
7
8
9
f(x)
−3.4
−2.3
−0.7
0.2
0.7
1.4
1.7
(a) Estimate
9
f(x)
dx
3
using three equal subintervals with right endpoints.
R3 =
If the function is known to be an increasing function, can you say
whether your estimate is less...

A stream of water vapor flowing at a rate of 260.0 mol/h is
brought from 600.0°C and 10 bar to 400.0°C and 1 atm.
Estimate the required cooling rate (a positive number in kW)
three ways.
Use five significant figures in your calculations.
(i) from the steam tables
Entry field with incorrect answer
kW
(ii) using heat capacity data in Table B.2
Entry field with incorrect answer
kW
(iii) using the enthalpy function of APEx (or Table B.8)
Entry field...

Consider the function ?(?) = ?^2 − 3? − 2.
a) Use Newton’s Method to estimate a root for the function given by
the above formula. More precisely: Using the initial value of ?1 =
5, calculate ?3.
b) Solve the quadratic equation ?^2 − 3?− 2 = 0 and compute the
two solutions to 4 decimal places. How do these compare to the
approximate root you computed in part (a) above?
c) Suppose your friend uses Newton’s Method to...

3. Use the enthalpies of formation in the table below to answer
the following questions.
Substance Enthalpy of Formation (kJ/mol), 298 K
Oxygen (O2)(g) 0
Methane (CH4)(g) -74.8
Carbon Dioxide (CO2)(g) -393.5
Water (H2O)(g) -241.8
Water (H2O)(l) -285.8
a) Calculate the change in enthalpy for the combustion of
methane using the values in the table above (assuming that the
system remains at 298 K) for the combustion of methane to form
carbon dioxide and gaseous water.
b) Repeat this calculation...

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