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1. Spy balloon is to be constructed of a material with a mass of 0.5kg. it will be filled with helium and must be able to carry and instrument payload of 50kg at an altitude of 1000m where the density of the air is 1.16 kg/m^3. what mass of helium will be required.
2. If the temperature of gas (measured in K) is doubled
a-the rms speed of the molecules doubles
b-the rms speed increases bh a factor of 2
c-the average kinetic energy quadruples
d-the average kinetic energy increases by a factor of 2
3. A 1-liter container of nitrogen gas (N2) at a temperature of 23c is intially at a pressure of 1.25 atm. because of a slow leak the pressure falls to 1.15 atm 1 hour later what is the leak rate in molecules/second?
4. How much energy is required to melt a 500cm^3 block of lead intitially at a temperature of 20c?
Weight Percentage of MTBE (methyl tert-butylether) in Gasoline : Oxygen Content, If gasoline had a hypothetical chemical formula of C8H17, and we knew the chemical formula of MTBE as CH3OC4H9, what weight (actual weight and percent by weight) of M..
The specification for a sieve plate column is given below. Make a preliminary mechanical design for the column. Your design should include:
The organic solution is evaporated to dryness and then the product is purified by chromatography in methanol over aluminum oxide or silica gel. Sketch a block flow diagram of the process.
Non -zero heat flux component , since temperature changing in r - direction only , qr is present , the control volume , dr , as shown - Heat flux entering the control volume at r= r = qr = 4.π.r^2. qr|r
A carbon steel heat exchanger that costs $140,000 is expected to have a service life of five years before it requires replacement. If type 304 stainless steel is used then the service life will be increased to ten years. Which exchanger is the mos..
1 when a thermocouple is moved from one medium to another medium at a different temperature the thermocouple must be
Problem 1: For the circuit given in Figure 1 the power factor is 0.72 lagging and the power dissipated is 375 W.
in the direct steelmaking reactor based on the reduction of an oxidizing foaming slag by char carbon particles and
Consider 1 mole of ideal gas at 1 bar and 300 K, which of the following statements is true? The absolute entropy of the system is negative. Helium (m=4 amu) will have a larger entropy than argon (m=40 amu).
a solution containing 30 wt. benzene b 45 wt. toluene t and 25 wt. xylene x is fed into a distillation process as
Example introduced a heat exchange system revamp problem. If the plate heat exchanger E101 in Figure 2.19 is the gasketed-plate type, then the exchanger area can be increased by adding plates to the exchanger. How much additional area must be adde..
The fractional distillation column will operate at approximately constant pressure of 1 atm. The reflux ratio is 2. How many theoretical plates must the column have if the feed is introduced into the eighth plate?
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