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You have to remove 12,000 kJ/h from a refrigeration space at 4 oC and reject the heat into the surroundings at 30 oC.
a) How much work per hour (power) would you have to use if you have an ideal Carnot reverse heat engine?
b) If you have a vapor compression cycle using HCF-134a refrigerant instead, what is the minimum pressure would you have to achieve in the compressor in order to reject heat into the surroundings assuming that you need the refrigerant to be a minimum of 5 oC temperature higher than the surroundings at 30 oC throughout the condenser?
c) In class, we discussed the use of a turbine in a vapor compressor cycle instead of a throttle. If we had a non-ideal turbine, how does the fraction of vapor of the refrigerant change at the exit of the turbine compared to the use of an ideal turbine. Assume the same exit pressure. Explain answer (just a qualitative answer is sufficient.)
How many grams of KOH must be added to .500L of the buffer (206mL of 0.453M HCL and .500L of 0.400M sodium acetate)to change the pH(4.79) by .135 units?
A weak acid HX has Ka = 1.00×10-6. What would be the pH of a 0.10 M solution of HX in water?
A 100.0 g sample of a metal M is burned in air to produce 103.7 g of its oxide with the formula M2O. What is the atomic mass of the metal?
When 5.25 g of sodium oxalate is reacted with 5.25 g of calcium chloride, how many grams of sodium chloride and calcium oxalate are formed?
Determine the partial pressure and total pressure of the gases and Find the partial pressure of carbon dioxide in a gas mixture
What is the molecular formula of the molecule that had an empiricial formula of C2 H4 S and a molar mass of 180.35% g/molecular.
Standardization of Na2S2O3, Added 0.12 g KIO3 and dissolved in 75 mL of distilled water. Added .20 g of KI to solution, then added 10 mL of 1M HCl and immediately titrated with thiosulfate solution (made by weighed 25 g of Na2S2O3-5H20
A 771 mL gas sample at STP is compressed to a volume of 242 mL, and the temperature is increased to 31?C. What is the new pressure of the gas in Pa
An alcohol is 12.61 percent Hydrogen, 37.47 percent Carbon, and 49.92 percent Oxygen by mass. Determine the empirical formula of the alcohol.
Fully explain two disadvantages of the colorimetric method to determine the concentration of species over te classial titration method. using two chemichal reactions explain how iodate ions and ypochlorite ions both act as oxidizing agents
A solution is made by mixing 12.0g of NaOH and 70.0mL of 0.200m HNO3. Calculate the concentration of OH- ion remaining in the solution.
If Ice melts at 273.15K with delta H fusion equaling 6.01kJ/ mol. An ice cube whose mass is 13.8 kg is dropped in a swimming pool whose temperature is held at 22.5 degrees Celsius.
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