Question

A rigid vessel contains liquid vapour mixture in the
ratio of 3:2 by volume. Determine quality of water vapour mixture
and total mass of fluid in a vessel if the volume of vessel is 2m^3
and initial temperature is 150c

Ans=Mass=1103.99 kg Quality=0.001848

Answer #1

A rigid container with a volume of 2 m3 initially contains 0.05
m3 of liquid and 1.95 m3 of vapor at 125 kPa. Heat is transferred
from a 3000C source to the contents of the vessel until the
pressure in the container reaches 4 MPa. The contents of the vessel
are now cooled in a surrounding temperature of 250C until the
contents reach its initial state.
Determine total entropy generated (Sgen) during the cycle.

Initially (state 1) a well-insulated rigid tank contains 20 kg
of a saturated liquid-vapor mixture of water at 100 kPa and half of
the mass is in the liquid phase. An electric resistance heater
placed in the tank is now turned on and kept on until all the
liquid in the tank is vaporized (state 2). Determine (a) the
initial specific volume in m3/kg, (b) the final specific
entropy in kJ/kg.K and (c) change of entropy in kJ/K.

Initially (state 1) a well-insulated rigid tank contains 20 kg
of a saturated liquid-vapor mixture of water at 100 kPa and half of
the mass is in the liquid phase. An electric resistance heater
placed in the tank is now turned on and kept on until all the
liquid in the tank is vaporized (state 2). Determine (a) the
initial specific volume in m3/kg, (b) the final specific
entropy in kJ/kg.K and (c) change of entropy in kJ/K.

system, a rigid tank, contains mixture of saturated water vapor
and saturated liquid at 90 oC. Total mass is 1.5 kg. quality is
0,34. system is heated untill all liquid is converted into vapor.
how much heat is transferred to the syste, show this process in
P-v-diagram

3. A two-phase liquid-vapor mixture of water, initially at 1.0
MPa with a quality of 71.1436%, is contained in a rigid,
well-insulated tank. The mass of H2O is 2 kg. An electric
resistance heater in the tank transfers energy (heat) to the water
at a constant rate of 80 W. Determine
(a) the time, in hour, when the temperature in the tank reaches
350oC, and
(b) the final pressure, in MPa.

A 0.1-m3 rigid tank contains saturated liquid-vapor mixture of
water, initially at 150 kPa and 52 percent quality. Heat is now
transferred to the tank until the system becomes superheated vapor
and the pressure reaches 300 kPa. Determine (a) the total mass of
the mixture in the tank and (b) the amount of heat transferred.

A well-insulated rigid tank contains 6 kg of saturated liquid
vapor mixture of water at 150 kPa. Initially, half of the mass is
in liquid phase. An electric resistance heater placed in the tank
is then turned on and kept on until all the liquid is vaporized.
Determine the electrical work (Wel) in MJ

A well-insulated rigid tank contains 5-kg of a saturated
liquid-vapor mixture of water at 100 kPa. Initially, three-quarters
of the mass is in the liquid phase. An electric heater with a power
rating of 880 W is placed in the tank. Determine how long it will
take to vaporize all the liquid in the tank. Show the process on a
T-v diagram with respect to saturation lines.

Water of mass 2 kg in a closed, rigid tank is initially in the
form of a twophase liquid-vapor mixture. The initial temperature is
50° C. The mixture is heated until the tank contains only saturated
vapor at 110° C.
(i) Find the initial pressure, in kPa.
(ii) Find the work for the process, in kJ.
(iii) Find the heat transfer for the process, in kJ.

Please do it as fast as you can, with step .
1. A closed rigid tank starts with 0.017263 ft^3 of saturated
liquid and 8.3 ft^3 of saturated vapour at 200 F. The water is
heated until it contains only saturated vapour.
Please find a)original liquid mass, b) original vapor mass, c)
original quality d) final temparature and e) total heat tranfer

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