Question

Two pounds of water mass at 500 F occupies a volume of 14,0354 ft ^ 3 in a cylinder-plunger device. The water is cooled under constant pressure until all the water is found as a saturated liquid. Determine the specific pressure, temperature and volume in the final state.

Answer #1

Mass of water is expressed in terms of 2lbm (pound)

1. A tank of air contains 100 ft^3. The pressure and temperature
are 1000 F and 100 psia. The air
is cooled to 100 F.
a. Find the mass of the air
b. Find the initial energy of the tank (Btu)
c. Find the final energy of the tank (Btu)
d. Compute the heat (Btu)
2. Water is contained inside a constant pressure piston cylinder
device. The initial temperature
and quality of the water are x=0 and T=300 F. The...

4. Saturated water occupies a piston of volume of 1.0m3. Heat is
added until it is completely vaporized if the pressure is held
constant at 1000kPa, calculate the work done in MJ. (note the mass
does not change)

A piston-cylinder device contains 0.54 kg of steam at 300
degrees C and 3 MPa. Steam is cooled at constant pressure until
one-half of the mass condenses. (A) Find the final temperature (B)
Determine the volume change

a plunger cylinder device contains 0.8 kg of water at 4 Mpa and
500 ° C, it begins to lose heat causing the piston to descend to a
set of stops inside the cylinder, at which point saturated steam is
obtained through an isobaric process. Cooling continues until the
cylinder contains water at 1 atm pressure. The heat transferred
during this process is kJ

A piston-cylinder device initially contains 75 g of saturated
water vapor at 340 kPa . A resistance heater is operated within the
cylinder with a current of 0.6 A from a 300 V source until the
volume doubles. At the same time a heat loss of 7 kJ occurs.
Part A)Determine the final temperature (T2).
Part B)Determine the duration of the process.
Part C)
What-if scenario: What is the final
temperature if the piston-cylinder device initially contains
saturated liquid water?

The mass of nitrogen at 20 Celsius and two atmospheres of
pressure occupies a volume of 800m^3. What is the variation of
volume produced when heated isobaric until 156.6 Celsius? What is
the variation of pressure produced from the gas if the gas is
heated until the same temperature but with constant volume?

In a piston cylinder device, initially 0.005 m3 liquid water and 0.9 m3 water vapor are at equilibrium at 600 kPa. Heat is given at constant pressure until the final temperature reaches 200 ° C.
(a) Show the process in the P-v and T-v diagram
(b) What is the initial temperature of the water?
(c) Find the total mass of water
(d) Calculate the final volume

500 g of saturated liquid water is contained in a
piston-cylinder arrangement. The inside diameter of the cylinder is
100 mm. The water is heated at a constant pressure of 150 kPa until
it becomes saturated vapor. Determine (a) the distance through
which the piston is raised, and (b) the amount of energy
transferred to the water.

Entropy From Steam Tables
A piston-cylinder assembly contain 2 kg of water. The water is
initially at the pressure of 0.5 MPa and the temperature of 300°C.
The water is cooled down at constant pressure process until it is a
saturated vapor. Determine the change in the entropy of the
system.

An initially empty, well insulated, rigid tank with a volume of
2 m3 is fitted with a mixing device. The tank has two inlets and
zero outlets. One inlet is water at 1 MPa and 600◦C while the other
is saturated liquid water. Both enter the tank slowly. If the
amount of work done by the mixing device is 300 kJ, what must the
temperature of the saturated liquid water be if the same mass is
added through both inlets...

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