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1. Inside a rigid container, a mixture of three ideal gases with mass fractions of 30% N2, 50% O2 and 20% CO2 has a total mole of 10 kmol.
a. What's the molar mass of the mixture?
b. What are the specific heats (cv and cp) of the mixture?
c. Determine the heat transfer needed to raise the temperature of this mixture from 0 °C to 50 °C.
2. An insulated rigid tank is divided into two compartments by a partition, as shown in the following figure. One compartment contains 2 kg of oxygen gas at 50°C and 200 kPa, and the other compartment contains 3 kg of nitrogen gas at 30°C and 350 kPa. Now the partition is removed, and the two gases are allowed to mix. Determine (a) the mixture temperature and (b) the mixture pressure after equilibrium has been established.
Assuming that the occupants' body heat provides a continuous source of 320 W within the igloo, calculate the inside air temperature when the outside air temperature is Too = -40 C. Be sure to consider heat losses through the floor of the igloo.
A solenoid 2.8 m long has a radius of 0.85 cm and 660 turns. It carries a current I of 2.5 A. What is the approximate magnetic field B on the axis of the solenoid?
Find M and calculate the magnitude m = 39, of the moment which tends to screw the pipe into the fixed block about its angled axis through O - For design purposes it is also necessary to have the vector expression for the moments of the two forces ..
design an al-si brazing filler alloy that will be used to join an al-mg alloy. the al-mg alloy has a solidus
The amount of heat (dh = 327.18 KJ) is added to an open volume of 1m3 of air (at standard sea level conditions), causing it to expand to 4 m3. How much work is done by the air? What is the internal energy of the gas after the expansion?
A small steel ball bearing with a mass of 13 g is on a short compressed spring. When aimed vertically and suddenly released, the spring sends the bearing to a height of 1.35 m. Calculate the speed at which the ball leaves the spring.
steam enters a nozzle operating at steady state at 3 mpa 300oc with a velocity of 80 ms. the exit pressure and
the top surface of an l 5-mm-thick anodized aluminum plate is irradiated with g 1000 wm2 while being simultaneously
An external force F is then applied on the piston until the pressure inside the cylinder increases to 100atm. assuming the coefficient of compressibility of water remains unchanged during compression, estimate the energy needed to compress the wat..
find the specific volume of steam in m3kg at 2.5 mpa and 283 degrees c. what is the value predicted by the ideal gas
a vehicle traveling at 30 mph enters a 600 ft radius curve and begins to increase its speed at a rate of 10 fts2. find
Determine the number of revolutions that the motor executes in a) reaching its rated speed, b) coasting to rest.
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