How much natural gas do you need to burn to heat twenty liters of water from 0 degrees C to 30 degrees C?
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Q: To raise the temperature of 4.29 grams of H2O from -5.0∘C to 20.0∘C, which part of this heating…
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How much natural gas do you need to burn to heat twenty liters of water from 0 degrees C to 30 degrees C?
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- Convert the total kilowatts per year for all appliances into equivalent amounts (pounds) of oil burned to generate this energy. (It takes about 5.4 pounds of fuel oil to generate one kilowatt of energy. So, pounds of fuel oil per year = kilowatts per year * 5.4) __________________ Pounds fuel oil per year1. The diagram shows a simple engine. Fuel is burnt to produce heat which raises the temperature of the gas in the cylinder; the gas expands pushing up the piston. Flywbeel Piston Crank HEAT (a) Explain why heat must be lost before the piston can come back down? (b) What energy changes take place in this engine? (c) Draw an energy flow diagram for the engine. (d) Why can't all the energy from the fuel be converted to useful work?Your neighbor lives in a 2500-square-foot (about 250 m2) older house heated by natural gas. The current gas heater was installed in the early 1980s and has an efficiency (called the Annual Fuel Utilization Efficiency rating, or AFUE) of 65 percent. It is time to replace the furnace, and the neighbor is trying to decide between a conventional furnace that has an efficiency of 80 percent and costs $1500 and a highefficiency furnace that has an efficiency of 95 percent and costs $2500. Your neighbor offered to pay you $100 if you help him make the right decision. Considering the weather data, typical heating loads, and the price of natural gas in your area, make a recommendation to your neighbor based on a convincing economic analysis.
- a) A woman tells an engineer that she stands in front of an open refrigerator, she feels cooler. But the engineer tells that it is impossible because the fan of the refrigerator is not running and this is only a psychological effect. Which side do you take ? Why ? b) Hot air at 50 C does not cause a lethal burn on our skin, but water with the same temperature is dangerous and it can burn our skin. Explain the reason? Any SAME answer from the internet sources or your friends will give you ZERO (0) point. *To raise the temperature of 4.29 grams of H2O from -5.0∘C to 20.0∘C, which part of this heating process requires the most energy? Pay attention to your units!AaBbCcDd AaBbCcDd AaBbC AaBbCcC AaB AaBbCcD AaBbCcDd AaBb I Normal 1 No Spac. Heading 1 Heading 2 Title Subtitle Subtle Em. Emp- Paragraph Styles There is a hot water source in New Delhi.Our plan is to use this heat source for heating and hot water supplies of a site of 100 hostels. The outlet temperature of the water from the source is 170°C. 4- An official realizes that the outlet temperature of the groundwater is too high and is considering using it to generate electricity. Design an Organic Rankine Cycle (ORC) suitable for this purpose. (Ctrl)
- How is the correspondence between the high temperature in the fire zone (2400 – 2600K) and the temperature at the exit from the combustion chamber (1400 - 1800K) achieved? 3.A car has a fuel efficiency of 17.5 mpg and is driven 100,000 miles during its life. How many lbs of CO2 per mile are generated? Given 19.4 lbs of CO2 emitted per gallon of gas. If the fuel efficiency of this same car were increased to 35 mpg, how much less CO2 would be emitted to the atmosphere over the course of the car’s lifetime? Your answer should be in lbs of CO2.1. What is geothermal energy? Where can geothermal energy be found? Mention different sources of geothermal energy. What are the uses of geothermal energy?
- By burning a fuel, the rate of heat release is 500 kW at 2000 K. What would 07 be the first law and second law efficiencies if 1) energy is absorbed in a metallurgical furnace at the rate of 480 kW at 1000 K 2) energy is absorbed at the rate of 450 kW for generation of steam at 500 K and 3) energy is absorbed in a chemical process at the rate of 300 kW at 320 K. Take ambient temperature 300 K. What is the inference that you can draw from this example?The energy densities of various types of coal are listed below: Anthracite 35kJ/g Subbituminous 31kJ/gBituminous 28kJ/g Lignite 26kJ/gAn unknown sample of one of these coals is burned in an apparatus with a calorimeter constant of 1.3kJ/°C. When a 0.367-g sample is used, the temperature change is 8.75°C. Which type of coal is the sample?what are the instruments/materials used by scientist to study Thermoclines under water.