Chemical Engineering

The gross heating value (GHV) of gaseous propane at 298 K is 2219.71 kJ/mol. Calculate the net heating value (NHV) of the propane. Given that, the latent heat of water vapours at 298 K=2442.5 kJ/kg.

Chemical Engineering

A hot rolled steel section tus the size HSS 10% Describe the cross-sectional shape of the member State what each number represent include units)

For the tooltat press ALT+F10 PC) or ALT FN-F10 (Mac)

For the tooltat press ALT+F10 PC) or ALT FN-F10 (Mac)

Chemical Engineering

A gas cylinder contains N2 at 200 kPa and 80°C. As a result of cooling at night the pressure in the cylinder drops to 190 kPa and the temperature to 30°C. How much work was done on the gas?

Chemical Engineering

A series circuit contains a resistor with R = 40Ω, an inductor with L = 2 H, a capacitor with 0.0025 F, and a 12 − V battery. The initial charge is Q = 0.001 C and see the initial current is 0. Using the method of undetermined coefficients, find the charge at time t

Chemical Engineering

series circuit contains a resistor with R = 40Ω, an inductor with L = 2 H, a capacitor with

0.0025 F, and a 12 − V battery. The initial charge is Q = 0.001 C and the initial current is

0. Using the method of undetermined coefficients, find the charge at time t

0.0025 F, and a 12 − V battery. The initial charge is Q = 0.001 C and the initial current is

0. Using the method of undetermined coefficients, find the charge at time t

Chemical Engineering

0.05 kg of steam at 10 bar, dryness fraction 0.84, is heated reversibly in a rigid vessel until the pressure is 20 bar. Calculate the change of entropy and the heat supplied.

Chemical Engineering

Acetone is used in the manufacture of many chemicals and also as a solvent. In its latter role, many restrictions

are placed on the release of acetone vapor to the environment. You are asked to design an acetone recovery

system having the flowsheet illustrated below. All the concentrations shown in the figure of both gases and

liquids are specified in weight percent in this special case, to simplify calculations. Calculate A, F, W, B and D,

per hour

are placed on the release of acetone vapor to the environment. You are asked to design an acetone recovery

system having the flowsheet illustrated below. All the concentrations shown in the figure of both gases and

liquids are specified in weight percent in this special case, to simplify calculations. Calculate A, F, W, B and D,

per hour

Chemical Engineering

The process flow diagram above resembles a three stage separation circuit. The ratio P3/D3 is 3, the

ratio P2/D2 is 1 and the ratio of A to B in stream P2 is 4 to 1. Calculate the total mass of stream E.

ratio P2/D2 is 1 and the ratio of A to B in stream P2 is 4 to 1. Calculate the total mass of stream E.

Chemical Engineering

A ore with a work index of 12.5 kWhr/t is ground in a lab ball mill for 10 minutes using a

20,125 gram charge of half-inch stainless steel balls. The 80 % passing size of the ore was

initially 4 mm while the 80 % passing size after grinding was 93 microns. A second sample of

a similar ore was subjected to the identical procedure. The sample had an 80 % passing size of

3 mm and the product showed an 80 % passing size of 107 microns. What is the work index

of this second ore sample?

20,125 gram charge of half-inch stainless steel balls. The 80 % passing size of the ore was

initially 4 mm while the 80 % passing size after grinding was 93 microns. A second sample of

a similar ore was subjected to the identical procedure. The sample had an 80 % passing size of

3 mm and the product showed an 80 % passing size of 107 microns. What is the work index

of this second ore sample?

Chemical Engineering

A piston-cylinder device contains 3.5 kg of water. Initially the water is a saturated

liquid at 105 °C (State 1). The water is heated until the piston just touches the stops, at

which point the volume is 2.18 m3 (State 2). Heating of the system continues until a

pressure of 1000 kPa is reached (State 3).

(a) Calculate the work done by the device during the process from state 1 to state 3

(kJ).

(b) Calculate the heat transfer required for this process (kJ).

(c) Draw the process on a pressure - volume diagram with respect to the saturation

lines.

liquid at 105 °C (State 1). The water is heated until the piston just touches the stops, at

which point the volume is 2.18 m3 (State 2). Heating of the system continues until a

pressure of 1000 kPa is reached (State 3).

(a) Calculate the work done by the device during the process from state 1 to state 3

(kJ).

(b) Calculate the heat transfer required for this process (kJ).

(c) Draw the process on a pressure - volume diagram with respect to the saturation

lines.