A steel tank contains water at ? = 1.00 MPa and ℎ = 3100 kJ/kg.
Determine the following:
a. State of the water; ie whether the water is compressed water
or saturated water or superheated vapour? (Hint: Use Saturated
water—Pressure table to compare ℎ at ? = 1.00 MPa)
b. Estimate the temperature of the water. (Hint: Use Saturated
water—Pressure table or Superheated water, depending on the state
you find in a)
c. Other properties of water in the tank...
Determine the temperature, quality (X), specific volume, and
internal energy of water at a state of P = 0.6 MPa and the enthalpy
may be one of the followings; 1. h = 2930 kJ/kg. 2. h = 1700 kJ/kg
3. h = 600 kJ/kg Plot your results on T-v diagram for each case.
Use thermodynamics' tables.
Water at 700 oC has a specific volume of 0.02600m3/kg. Determine
the pressure of the water based on a) ideal gas equation, b) the
generalized compressibility chart and c)the steam tables. (d)
Determine the error involved in cases (a) & (b).
Determine the activation energy in kJ/mol for a first order
reaction if its specific rate constant 8.30e-05 s-1 at
350.0 K and 3.25e+01 s-1 at 560.0 K.
Ea = ______ kJ/mol
A) What is the specific internal energy of water at 50 kPa and
190°C? Use data from the steam tables. The specific internal energy
of water is ___ kJ/kg.
B) What is the specific volume of R-134a at 20°C and 730 kPa?
What is the internal energy at that state? Use data from the steam
tables.
The specific volume is ___m3/kg.
The internal energy is ___kJ/kg.
Determine
how much
energy in kJ would be transferred if 300.0 grams
of steam (gaseous
water) at 150.0
̊C
is cooled to ice
(solid water)
at -20.0
̊C.
The specific
heat
of steam is
1.86
J/(g∙ ̊C),
the
specific heat
of ice is 2.06
J/(g∙ ̊C),
the heat of fusion of water
is 333
J/g, and
the heat
of vaporization is 2256 J/g.