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Superheated steam at a pressure of 40 bar and a temperature of500°C is supplied to the turbine of a Rankine cycle.
(a) If the condenser pressure is 0.03 bar, find the thermal efficiency of the cycle. Neglectfeed pump work.
(b) If the isentropic efficiency of the steam turbine in part (a) above is0.82, find:
(i) The enthalpy of the steam discharged into the condenser and
(ii) The thermal efficiency of the cycle.
What is the relationship between the atomic numbers and the ionic radius of the elements in a group.
What is the mass in grams of 2.50 x 10^12 lead (Pb) atoms. Enter your answer in scientific notation.
If the volume is increased to 68.0 at constant temperature, how many collisions will occur per square inch of this larger container. Enter the number of collisions per square inch.
Acetylsalicylic acid (aspirin), HC9H7O4, is the most widely used pain reliever and fever reducer in the world. Find the pH of 0.011 M aqueous aspirin at body temperature (Ka at 37C = 3.6 10-4).
How many grams of sodium azide, NaN3 are needed to react by the equation below in order to inflate a 50.0: air bag with N2(g) at 298K and 1.20 atm? NaN3(s) -------> Na (s) + N2
the vapor pressure of pure methyl alcohol at 19?c is 90.0 torr and that of pure ethyl alcohol is 40.0 torr. assume a
containing too little oxygen to allow complete combustion of the fuel is called a rich mixture. A high-performance heater that burns propane, C3H8(g), is adjusted so that 100.0 g of O2(g) enters the system for every 100.0 g of propane. Is this mix..
a 355 ml container holds .146g of ne and an unknown amount of ar at 35 degrees c and a total pressure of 26 mmhg.
the resulting solution exerts an osmotic pressure of 829 torr. what is the molar concentration of the solution? how many moles of solute are in the solution? what is the molar mass of the solute?
chemicals x and y react to form the gas xy but it takes some time for the reaction to occur. both x and y are placed in a container with a piston and you note the volume. As the reaction occurs, what happens to the volume of the container? explain..
A catalyst introduces an extra step into the reaction and reduces Ea for the first step to 50kJ/mol. Indicate the effect of this catalyst on your diagram. How would you expect the equilibrium constant for this reaction to vary with temperature
Calculate the number of moles in each of the following: a) 85.2 g of Ni, b) 144 g of K, c) 6.4 g of H2O, d) 308 g of BaSO4, e) 252.8 g of fructose C6H12O6
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