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The preparation of NO2(g) from N2(g) and O2(g) is an endothermic reaction: N2(g)+O2(g) yields NO2(g); (unbalanced) The enthalpy change of reaction for the balanced equation (with lowest whole-number coefficients) is H 67.7 kJ. If 2.50 102 mL of N2(g) at 100.C and 3.50 atm and 4.50 102 mL of O2(g) at 100.C and 3.50 atm are mixed, what amount of heat is necessary to synthesize NO2(g)?
The atmospheric pressure of 100k Pa acts on the other side of the piston. The gas is heated until the volume is doubled and the final pressure is 500 kPa. Calculate the work done by the gas.
The line is commercial steel pipe, 25 mm internal diameter, length 120 m. The properties of the fluid are: viscosity 0.99 mNm-2 s, density 998 kg/m3. Calculate the total pressure drop due to friction when the flow rate is 3500 kg/h
question 1the effect of a hazardous substance depends on the concentration of the substance that is present in the
Into a barrel containing 33.2 bbl (US) of water containing 0.0012 mol/L of a blue dye you pour V2 yd3 of water containing 8.91 M of the dye. The final concentration of the dye in the barrel is 7.91 mol/m3 after it's well-mixed. What is V2 is yd^3?
Finding the Heat of Reaction (Enthalpy) from Heats of Formation, Calculate the heat of reaction at the standard reference state for the following reactions
High-density polyethylene may be chlorinated by inducing the random substitution of chlorine atoms for hydrogen.
Suppose you pour a gallon of water on a yowling cat 10 ft below your bedroom window. (a) How much potential energy (ft · 1bf) does the water lose?
Estimate the number-average molecular weight that is required to give a tensile strength of195MPa.
Make a rough estimate of the cost of steam per ton, produced from a packaged boiler. 10,000 kg per hour of steam are required at 15 bar. Natural gas will be used as the fuel, calorific value 39 MJ/m3 (roughly 1 MMBtu/1000 scf). Take the boiler eff..
a. How many design variables must be specified in order to calculate the output stream compositions and flow rates? b. How would you optimize these variables if the objective of the separator was to maximize recovery of condensable components into ..
The Telephone transmission rate at the T3 level is 44.7 Mb/s. Each telephone message accupies 64,000b/s. How many simultaneous message could be set along this system?
question 1a outline the provisions of occupational safety and health act 2005 with regard to substances hazardous to
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