1. Calculate the heat required to raise the temperature of 1.5 mol of benzene from 300oC
to 700oC in a steady-flow process at a pressure sufficiently low that may be considered as
an ideal gas. Tip: Please read the textbook page 125-127 and pay particular

1. A steam turbine operates adiabatically with a stream rate of 25 kg/s. Steam is supplied at
1300 kPa and 400 C and discharges at 40 kPa and 100 C. Determine the power output of the
turbine and the efficiency of its operation in comparison to a turbine t

Solution - ChE 226 Home Work Assignment 7, 04/02/2015
1. An ideal gas with constant heat capacity undergoes a change of state from conditions T1, P1 to
conditions T2, P2. Determine H and S from the following case
T1 = 400 K, P2 = 1.2 bar, T2 = 500 K, P2 =

Solution - ChE 226 Home Work Assignment 9
1. Is acetylene at 300 K and 40 bar in liquid or vapor phase? Calculate Z, HR, and SR by the R-K equation
of state and compare the results with the values found from Lee- Kesler generalized correlations. (Please
c

ChE226 Thermodynamics I
1st midterm exam 03/04/2015
ChE226 Thermodynamics I
1st midterm exam 03/04/2015
Student Name:
Student ID:
1
1st midterm exam 03/04/2015
ChE226 Thermodynamics I
1. One mole of argon is reduced its temperature and pressure from 400 K

Solution - ChE 226 Home Work Assignment 2
1. A nonconducting container filled with 35 kg of water at 20 oC is fitted with a stirrer, which is
made to turn by gravity acting on a weight of mass 25 kg. The weight falls slowly through a
distance of 50 m in d

ChE 226 Homework Assignment 8
Due Monday (April 6th)
TA: Katharine Greco, E-mail: kgreco@umass.edu
1. Consider the air condition of a house through use of solar energy. At a particular location
experiment has shown that solar radiation allows a large tank

ChE 226 Home Work Assignment 5 Solution
1. Reported values for the virial coefficients of methane vapor at 200 oC are
B = -4.19*10-6m3/mol; C = 1.615*10-9 m6/mol2
Calculate V and Z for methane at 200 oC for 20 bar by
(1)The ideal-gas equation;
(2)Virial e

Solution - ChE 226 Home Work Assignment 4, 02/28/2015
1. An ideal gas initially at 600 K and 10 bar undergoes a four-step mechanically reversible cycle in a closed
system. In step 12, pressure decreases isothermally to 3 bar; in step 23, pressure decrease

Solution - ChE 226 Home Work Assignment 3
Problem 1 (40 points)
An initially evacuated tank is filled with gas from a constant-pressure line. At the end, the
pressure of the tank is equal to the pressure of the gas line, and the filling is stopped. The en

Problem 1 (40 points)
ChE 226 HW 1, 02/12/2015
You should use the data at 0oC and 100oC to build the calibration curve for the temperature scale. The
obtained correlation is V (cm3/g)= 0.000013421*T(oC)+0.073556
Using the correlation equation, we obtained