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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.
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)
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?

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


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
0.05 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.
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
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.
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?
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.
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