Problem on frictional losses

A stream of propane is throttled from 4.298 bar and 450 K to 0.22 bar. This process is irreversible due to frictional losses at the nozzle.

a. In words or equations, why are frictional losses irreversible?

b. What is the final temperature of propane (after throttling)? The constant-pressure heat capacity of propane is 92.7 J/mol/K. Clearly state any assumptions you need to make to solve this problem.

View Complete Question

Related Questions in Chemical Engineering

Q : Calculating adiabatic flame temperature

Calculate the adiabatic flame temperature of acetylenes gas at a pressure of 1 bar under the following conditions. The reactants are initially at 298K. Assume that the acetylene reacts completely to form CO2 and H2O:

Q : Estimating solubility of oxygen in water

The Henry's law constant for oxygen in water is as follows: Temperature, °C 0 &nbs

Q : Problem on weight fraction A gas

A gas contains 350 ppm of H2S in CO2 at 72°F and 1.53 atm pressure. If the gas is liquified, what is the weight fraction H2S?

Q : I need to solve the material and energy

I need to solve the material and energy balance for the att.

Q : Problem on empirical van Laar equation

At atmospheric pressure ethyl acetate and ethyl alcohol form an azeotropic mixture containing 53.9% mole of ethyl acetate and boiling at 71.8°C. a) Estimate the values of A & B in the empirical van Laar equation

Q : Chemical flow I) Sulphur dioxide (SO2)

I) Sulphur dioxide (SO2) with a volumetric flow rate 5000cm3/s at 1 bar and 1000C is mixed with a second SO2 stream flowing at 2500cm3/s at 2 bar and 200C. The process occurs at steady state. You may assume ideal gas behaviour. For SO2 take the heat capacity at constant pressure to be CP/R = 3.267+5

Q : Problem on molar flow rate I) Sulphur

Q : Calculating flow rate of nitrogen The

The feed of an ammonia synthesis reactor is 25% (lbmole) nitrogen with the balance hydrogen. The flow rate is 3000 kg/h at 65°C and 95 bar. Calculate the flow rate of nitrogen to the reactor in kg/hr.

Q : Rate of flow of nitrogen The feed to an

The feed to an ammonia synthesis reactor contain 25 mole% nitrogen and the balance hydrogen. The flow rate of the stream is 3000 kg/hr. Calculate the rate of flow of nitrogen into the reactor in kg/hr. (Hint: First calculate the average molecular weight of the mixture).

Q : Problem on entropy A heater (heat

A heater (heat source temperature = 527 K) and turbine are connected in series as shown below:

Discover Q & A

Leading Solution Library

Avail More Than 1432144 Solved problems, classrooms assignments, textbook's solutions, for quick Downloads

No hassle, Instant Access

Start Discovering

18,76,764

1938446
Asked

3,689

Active Tutors

1432144

Questions
Answered

Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!

Submit Assignment