Question

Develop an expression to calculate the specific entropy for water vapor assuming an ideal gas. Use the second Gibb's equation and the polynomial for specific heat at constant pressure as a function of temperature (Table A-2(c)). Enter this expression into EES separating the temperature dependent term (e.g. standard state entropy) from the pressure dependent term.

Answer #1

Determine the specific volume of superheated water vapor at 88
MPa and 712K using the ideal gas equation. Then, do this problem by
using the generalized compressibility charts.
Thanks!

Automobiles that use hydrogen gas for fuel are currently being
developed. They emit mainly water vapor as exhaust and are less
harmful to the environment than gasoline powered cars. A chemist
combusts a certain amount of hydrogen gas in a constant pressure
calorimeter filled with 1.50 L of water. (The PM will explain in a
couple of minutes the fundamentals of how a calorimeter works). The
temperature of the water is raised by 3.70 °C. Assume the reaction
goes to...

Calculate the change in entropy for one mole of ideal gas which
expands from an initial volume of 2 L and initial temperature of
500 K to a final volume of 6 L under the following conditions.
P(initial) refers to the pressure when T(initial)= 500K,
V(initial)= 2 L.
a) Irreversible expansion against a constant pressure of
Pinitial/2
b) Irreversible expansion against a vacuum...a 'free
expansion'.
c) Adiabatic irreversible expansion against a constant pressure
of Pfinal
d) Adiabatic reversible expansion

We consider an isolated system made up of 2 moles of an ideal
gas which can pass reversibly from a state A (PA, VA, TA = 300 K)
to a state B (PB = 3PA, VB = VA / 3, TB) by a transformation which
comprises two stages: it is first isochoric (constant volume), then
isobaric (constant pressure).
1-Determine the work involved.
The ideal gas constant is R = 8.31 J / K.mol, and the internal
energy of an ideal...

An ideal monatomic gas is contained in a vessel of constant
volume 0.330 m3. The initial temperature and pressure of the gas
are 300 K and 5.00 atm, respectively. The goal of this problem is
to find the temperature and pressure of the gas after 24.0 kJ of
thermal energy is supplied to the gas.
(a) Use the ideal gas law and initial conditions to calculate
the number of moles of gas in the vessel. Your response differs
from the...

A storage tank contains liquid water at 50oC and is vented to
atmosphere at the top (where atmospheric pressure = 101.3 kPa). The
distance from the bottom of the tank to the liquid surface level is
1.55 m. What will be the absolute pressure at the bottom of the
tank?
(A) 12.35 kPa (B) 116.3 kPa (C) 201.3 kPa (D) 113.65 kPa
The pressure of an ideal gas drops significantly as it flows
under steady state conditions through an insulated...

1 moles of an ideal gas are in equilibrium at fixed pressure
(e.g. 106 Pa) and temperature (e.g. 300 K).
3)
The two key features of an ideal gas are:
A) U depends only on N and T, not V.
B) The V dependence of S is given by a term Nk*ln(V)
For a gas that obeys (A) but has some excluded volume so S goes
as Nkln(V-Nb), with b=10-28 m3, find the
equilibrium volume V. All other conditions are...

In class we discussed a reversible, isothermal compression of an
ideal gas. The initial point (1) is an ideal gas in equilibrium at
pressure 1 (P1), volume 1 (V1) and temperature (T), and the final
point (2) is an ideal gas in equilibrium at pressure 2 (P2), volume
2 (V2) and temperature (T), where V2
d) For each differential step, the change in entropy is given by
dS=qrev/T =!!!"#! . Since T is constant , this express ion can be...

1.
Find values of residual enthalpy for ethylene at 400 K and 25 bar
using Peng-Robinson equation of state.
2. Find values of residual Gibbs energy, enthalpy and entropy
for n-heptane at 500 K and 100 bar using Virial equation of
state.
3. Estimate the values of Compressibility factor, enthalpy and
entropy for Benzene and cyclohexane if it compressed from 650 K and
60 bar to 500 K and 110 bar.
4. Calculate ΔU and ΔH for 1 kg of...

If the number of moles of an ideal gas in a firm container
doubles while volume and temperature remain constant …
a. pressure doubles
b. pressure quadruple
c. pressure remains constant
d. pressure is reduced to half
e. pressure is reduced to a quarter
a
b
c
d
e
incorrect
IncorrectQuestion 2
0 / 1 pts
There are 3 balloons sitting next to each other, each of a
different size. What is in the biggest...

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