Study Guides
(238,281)

Canada
(115,055)

University of Guelph
(6,812)

Engineering
(33)

ENGG 3260
(5)

Linda Gerber
(4)

# Basic Problem_Properties_pure_substance.pdf

Unlock Document

University of Guelph

Engineering

ENGG 3260

Linda Gerber

Winter

Description

Properties of pure substance
Problem 1: A rigid container contains saturated liquid water at 200 kPa. Find water temperature and
internal energy. Show the state in a T-v diagram.
Water is saturated liquid inside
T Constant pressure line (P=200 kPa) the container. Therefore, it must
be on the saturated liquid line as
(°C) shown in the T-v diagram by a
* circular symbol ( ).
Tsat20.21 Constant temperature line (T=120.21°C)
3
v (m /kg)
From Table A-5:
Temperature: T = T sat120.21 °C
Internal energy: u = u f 504.50 kJ/kg
1 Problem 2: A rigid container contains saturated vapor of water at 125 kPa. Find water temperature and
internal energy. Show the state in a T-v diagram.
Water is saturated liquid inside
Constant pressure line (P=125 kPa) the container. Therefore, it must
T be on the saturated liquid line as
(°C) shown in the T-v diagram by a
* circular symbol ( ).
Tsat05.97 Constant temperature line (T=105.97°C)
3
v (m /kg)
From Table A-5:
Temperature: T = T sat105.97 °C
Internal energy: u = u g 2513.0 kJ/kg
2 Problem 3: A rigid container contains water vapor at 1 MPa and 300 °C. Find internal energy of the
water vapor. Show the state in a T-v diagram.
Water is a vapor (unknown phase)
inside the container. First identify
T
P =1.0 MPa the saturation temperature at
(°C) given pressure (1 MPa) from
* Table A5 which is 173.88 °C.
Draw pressure and saturation
T=300 temperature lines in the T-v
diagram. Now the given
T =179.88 temperature is 300°C. Draw the
sat 300°C temperature line (see
Figure). Now the intersection
point of the 1 MPa pressure line
and the 300°C temperature line
will give you current state and
3 you will see this is superheated
v (m /kg) water vapor.
From superheated water table (TABLE A6), internal energy, u=2793.7 kJ/kg
3 Problem 4: A rigid container contains unknown phase of water at 175 kPa. Internal energy of the
water in that container is measured as 2000kJ/kg. Find the phase, water temperature, and enthalpy.
Show the state in a T-v diagram.
Draw the constant pressure line and
identify corresponding saturation
T
(°C) 175 kPa temperature from TABLE A-5 and

More
Less
Related notes for ENGG 3260