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The standard molar entropies of water ice, liquid and vapor are 37.99, 69.91, and 188.83 J K-1mol-1, respectively. On a single graph, show how the Gibbs energies of each of these phases vary with temperature between – 20 C and 150 C for a constant pressure of 80 kPa. You can start your computations at the triple point (pressure of 0.611 kPa and temperature of 0.01 C) where the molar Gibbs energy of all three phases are equal and can be assigned an arbitrary value of 1000 J mol-1. Use a molar volume of liquid water of 0.018 L mol?1 and solid water of 0.0195 L mol?
It's proposed to have a water heater that consists of an insulated pipe of 5-cm diameter and an electric resistor inside. Cold water at 20oC enters the heating section steadily at a rate of 30L/min.
To what precision (how many decimal places) must you know the value of a decimal degree in order to reliably convert it to the nearest second (1/3600 of a degree) To what precision (how many decimal places) must you know the value of a radian
The pedestal supports a load P at its center. If the material has a mass density p, determine the radial dimension r as a function of z so that the average normal stress in the pedestal remains constant.
A 20 kg box is on an upward inclined surface of 30 degrees from the floor. the velocity of the box is zero when it is subjected to a constant horizontal force F=30N. assuming the surface is smooth,
A two stage rocket with a total mass of 925kg is traveling at a speed of 6.6 10^3 m/s away from the earth . A predesigned explosion separates into two sections of equal mass that move with a speed of 2800m/s relative to each other along the original ..
An Engineer is designing a hydraulic lift with a capacity of 10 tons. The moving parts of this lift weigh 1000 lbf. The lift should raise the load to a height of 6 ft in 20 sec.
In a falling-head permeability test the initial head of 1.5m dropped to 0.5m in 4 h the diameter of the standpipe being 5mm. The soil specimen was 200mm long by 100mm in diameter.
The electrical power supplied to the motor is 90 kW. The motor in turn delivers 100 hp at a speed of 1000 rpm to a hoist arrangement for an elevator. Define the electric motor as the system and calculate the rate of work for the system.
A new sports car has a drag coefficient of .30 and a frontal area of 21 ft^2, and is traveling at 110 mi/h. How much power is required to overcome aerodynamic drag if p=.002378 slugs/ft^3?
Consider a singly reinforced concrete beam with a base dimension of b= 12in and d=20in. Assume all bars are located in one row. Use Grade 60 steel and 5ksi concrete. Find the nominal flexural strength and the design strength for the following cases
Lift Charts in direct marketing, The mass-mailing business is often used to illustrate the use of lift charts. Another real world application where the lift charts can be used
What is the concentration of MLVSS in the activated sludge (mg L-1)
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