Individual Assignment. Each student is required to complete the task in a full handwriting on an A4 paper. Due Date of Submission on 30th November 2011, before 2.00 PM. Late submissions will not be entertained.
1. A 1.8-m rigid tank contains steam at 220°C. One third of the volume is in the liquid phase and the rest is in the vapor form. Determine (a) the pressure of the steam, (b) the quality of the saturated mixture, and (c) the density of the mixture.
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2. A piston–cylinder device contains 0.85 kg of refrigerant-134a at 10°C. The piston that is free to move has a mass of 12 kg and a diameter of 25 cm. The local atmospheric pressure is 88 kPa. Now, heat is transferred to refrigerant-134a until the temperature is 15°C. Determine
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If the waste heat is transferred to the cooling water at a rate of 145 GJ/h, determine (a) net power output and (b) the thermal efficiency of this power plant. 16. Solar energy stored in large bodies of water, called solar ponds, is being used to generate electricity. If such a solar power plant has an efficiency of 4 percent and a net power output of 350 kW, determine the average value of the required solar energy collection rate, in Btu/h. 17. A household refrigerator with a COP of 1.2 removes heat from the refrigerated space at a rate of 60 kJ/min. Determine (a) the electric power consumed by the refrigerator and (b) the rate of heat transfer to the kitchen air. 18. A household refrigerator runs one-fourth of the time and removes heat from the food compartment at an average rate of 800 kJ/h. If the COP of the refrigerator is 2.2, determine the power the refrigerator draws when running.
19. Determine the COP of a heat pump that supplies energy to a house at a rate of 8000 kJ/h for each kW of electric power it draws. Also, determine the rate of energy absorption from the outdoor air. 20. Refrigerant-134a enters the condenser of a residential heat pump at 800 kPa and 35°C at a rate of 0.018 kg/s and leaves at 800 kPa as a saturated liquid. If the compressor consumes 1.2 kW of power, determine (a) the COP of the heat pump and (b) the rate of heat absorption from the outside
A sample of gas at 6.0 atm and 5.0ºC increases in temperature to 35ºC. If the volume is unchanged, what is the new pressure?
Predict: If the added mass on the lid was 50 kg, a total mass of 60 kg would exert pressure on the gas inside the container. What would be the volume of the gas? __.42 ______________
2. Read and record the temperature of the gas using the thermometer attached to the container.
7. Based on your data, what relationship exists between the pressure and the volume of a gas (assuming a constant temperature)?
This sheet must be completed and attached to the assignment by all students unless otherwise instructed. PLEASE COMPLETE
28) A basketball is inflated to a pressure of 1.90 atm in a 24.0°C garage. What is the pressure of the basketball outside where the temperature is -1.00°C? A) 2.08 atm B) 1.80 atm C) 1.74 atm D) 2.00 atm 29) The density of a gas is 1.43 g/L at STP. What is the gas? A) Cl2 B) O2 C) S 30) Zinc reacts with aqueous sulfuric acid to form hydrogen gas: Zn (s) + H2SO4 (aq) → ZnSO4 (aq) + H2 (g) In an experiment, 201 mL of wet H2 is collected over water at 27°C and a barometric pressure of 733 torr. The vapor pressure of water at 27°C is 26.74 torr. The partial pressure of hydrogen in this experiment is __________ atm. A) 1.00 B) 706 C) 0.929 D) 0.964 E)
8.When the reaction is completed, record the volume of gas in the graduated cylinder. Record observations about which reactant was the limiting reactant.
First, we added water to the graduated cylinder to 20 mL. Then, placed the unknown substance in the water, the water increased and measured 25 mL. The volume was determined by subtracting 20 mL from 25 mL. The volume equaled 5 mL for the unknown substance. Next, we filled the water to 20 mL in the graduated cylinder. Then, placed aluminum in the water, the water increased and measured 25 mL. The volume was determined by subtracting 20 mL from 25 mL. The volume equaled 5 mL for aluminum. After that, we added water to the graduated cylinder to 20 mL. Then, placed the zinc in the water, the water increased and measured 22.5 mL. The volume was determined by subtracting 20 mL from 22.5 mL. The volume equaled 2.5 mL for zinc. Last, we added water to the graduated cylinder to 20 mL. Then, placed lead in the water, the water increased and measured 24 mL. The volume was determined by subtracting 20 mL from 24 mL. The volume equaled 4 mL for
If the volume of the combustion container is 10.0 L, calculate the final pressure in the container when the temperature is changed to 110.° C. (Assume no oxygen remains unreacted and that all products are gaseous.)
The use of consumables, such as fridge fresheners must be discouraged and a potential use for the waste heat from the unit found
AP/ADMS3530 3.0 Assignment #1 Solution Winter 2010 Instructions: (1) This assignment is to be done individually. You must sign and submit the standard cover page supplied as the last page of this assignment. Before you start, please read the note “Writing Style Required for ADMS3530 Assignments” posted on the course web site. Please stick to the writing guidelines suggested in the note. This assignment is due in the class of the week of February 8, 2010. For Internet section students, the assignment must be uploaded to the Centre for Distance Education: http://www.atkinson.yorku.ca/cde/assignmentupload and identified precisely in accordance with the course outline by Tuesday, February 9, 2010, midnight. This assignment must be handwritten.
Upon visiting the Domain College Park apartment complexes, I have noticed some significant problems regarding the building’s energy use:
2. Note that the balloon in the chamber is filled with 0.300 moles of an
Madi King & Beth Braswell December 16, 2015 ICE CREAM THERMODYNAMICS LAB Introduction- The purpose of this lab was to determine how to lower the freezing point of water in order to freeze an ice cream mixture. In ice cream making removing 1000 calories of heat from a milk/sugar mixture is removed and is then transferred to the salt/ice mixture. Energy is conserved and this meets the requirements for the first law. Heat is always moving from the hotter object to the cooler one.
Data is constantly being collected regarding energy consumption at the American Society of Heating, Refrigeration and Air Conditioning Engineers (ASHRAE), headquarters in Atlanta. This data can be accessed by researchers from around the world, allowing them to monitor the performance of a building’s temperature control systems and extract data for further study.