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The Arrhenius equation was originally developed for comparing rates of chemical reactions. Compare the rates of a chemical reaction at 20 and 100°C by calculating the ratio of the chemical reaction rates. Assume that the activation energy for liquids in which the chemical reaction is conducted is 10 kJ/mol.
an air preheater for a power plant consists of a cross-flow heat exchanger with hot exhaust gases used to heat incoming
the hoover dam has a capacity to produce 2080 mw of electrical power. the difference in height between the surface of
rocket boosts the speed of a spacecraft from 7500 m/s to 10 500 m/s with a thrust of 890 kN. Calculate the rocket power.
heated air at 1 atm and 100 degrees f is to be transported in a 400 ft long circular plasitc duct at a rate of 12ft3s.
water enters a condenser at a pressure of 200 kpa and a quality of 0.95. the pressure drops by 25 kpa across the
the wheel has a mass of 25 kg and a radius of gyration k0.15m. it is originally spinning at w140 rads. if it is placed
Knowing that the modulus of elasticity of brass is 105 GPa, determine the magnitude of the load P for which the deflection of the plug is 1,25 mm downward.
an insulated rigid tank with a volume of 10ft3 is connected by a valve to a supply line containing steam at 500 psia
r-22 undergoes a process between two states. the process has an isentropic compressor efficiency of 80. at state 1 the
water as steam enters an adiabatic turbine at 6 mpa and 600 c with a flow rate of 5 kgs. after exiting the turbine the
A steam turbine is operated ith an input temp of 800C and exhaust temp of 150C. What is the maximum amount of work the turbine can do for a given heat input Q? Under what conditions is the maximum achieved?
a 3.0 cm a diameter copper sphere having a diameter initially at a uniform temperature of 50degc is suddenly exposed to
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