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In a coffee-cup calorimeter, 1.60 g of NH4NO3 is mixed with 75.0 g of water at an initial temperature of 25.00C. After dissolution of the salt, the final temperature of the calorimeter contents is 23.34C. Assuming the solution has a heat capacity of 4.18 J/C g and assuming no heat loss to the calorimeter, calculate the enthalpy change for the dissolution of NH4NO3 in units of kJ/mol.
A three-phase, wye-connected, cylindrical-rotor, synchronous motor, with negligible armature resistance and a synchronous reactance of 1.27 Ω per phase, is connected in parallel with a three phase, wye-connected load taking 50 A at 0.707 lagging p..
Find the optimal temperature versus time profile for the reactor and determine how long the process should be operated before the catalyst is changed out.
Compute the sending-end voltage, current, real power, and reactive power for the following conditions:
Emergent behavior is present in normal cellular and pathologic processes. How does emergent behavior lead to disease?
If the face opening for a laboratory hood installation is to be 2 feet high and 5 feet wide, what volumetric flow rate is required to generate a face velocity of 100 ft/min?
Assuming that there are no other significant side reactions, calculate masses of alcohol and ether produced, per 1000 kg of allyl chloride fed to the reactor.
Compute the effective armature ac resistance in per unit and in ohms per phase at 25°C.
Dependence of measured energy on temperature for a pyrometer - Plot the volumetric flow rate vs. height
In each case, explain the reasons why some elements are more soluble than others in water.
Thomas Industries and Washburn Corporation supply three firms (Zrox, Hewes, Rockwright) with customized shelving for its offices. They both order shelving from the same two manufacturers, Arnold Manufacturers and Supershelf, Inc. Because of long s..
A paper by Ruckenstein and Tsai (1981)* shows that an "optimum pore size" can exist for catalytic reactions of large solute molecules in solvent-filled pores. Obtain the paper from your library and read it carefully. Then derive the analytical equati..
Comment on whether the device is operating in the depletion mode or in the enhancement mode.
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