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Consider the following reaction: 2H2(g)+ O2(g) yields 2H2O(l); delta H=572 kJ .
a. How much heat is evolved for the production of 1.00 mol of H2O(l )?
b. How much heat is evolved when 4.03 g of hydrogen is reacted with excess oxygen?
c. How much heat is evolved when 186 g of oxygen is reacted wih excess hydrogen?
d. The total volume of hydrogen gas needed to fill the Hindenburg was 2.0 108 L at 1.0 atm and 25C. How much heat was evolved when the Hindenburg exploded, assuming all of the hydrogen reacted?
Find references for the magnitudes of these factors, andsum up the total amount of petroleum saved in a year, and total amount of CO2 saved in a year
A current i(t) = 20 cos(2π × 60)t A flows through a wire. Find the charge flowing, and the number of electrons per second that are passing some point in the wire.
Estimate a value for the total project cost that will give 98% confidence that the project can be carried out within the amount estimated.
Determine the motor current and speed when the diverter-circuit resistance is made equal to the series-field resistance. Neglect saturation and the voltage drops across the series- field resistance as well as the armature resistance.
Estimate the heat-transfer coefficient for steam condensing on the outside, and on the inside, of a 25 mm o.d., 21 mm i.d. vertical tube 3.66 m long. The steam condensate rate is 0.015 kg/s per tube and condensation takes place at 3 bar
A system can be represented by the block diagram below: Derive (write the different steps explicitly. not just the solution!) the closed-loop transfer function relating the set point (Ysp) to the output Y
determine the analog output voltage as a fraction of the reference voltage.
How many of the following ground state electron configurations are allowed? 1s22s22p7 1s22s22p62d1
Select suitable valve types for the following applications: a. Isolating a heat exchanger. b. Manual control of the water flow into a tank used for making up batches of sodium hydroxide solution.
The solid particles have average diameter 3 mm and piece density 730 kg/m3. Hot air at 150 ºC is blown up through the dryer belt at a volumetric flow rate of 7200 m3 /hr per m2 of belt area. Will the bed of solids on the belt fluidize?
If the capacitor, consisting of three equal sections, is connected in delta across the supply lines, calculate the capacitance required in each section.
Using T flip-flops, show the block diagram for a 3-bit ripple counter and its input and output waveforms.
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