68. The warmest temperature ever measured in the United States was 134 °F on July 10, 1913, in Death Valley, California. Convert that temperature to degrees Celsius and Kelvin

Energy conservationists suggest that air conditioners should be set so that they do not turn on until the temperature tops 78 F. What is the Celsius equivalent of this temperature?

During a recent winter month in Sheboygan, Wisconsin, it was necessary to obtain 3500 kWh of heat provided by a natural gas furnace with 89% efficiency to keep a small house warm (the efficiency of a gas furnace is the percent of the heat produced by combustion that is transferred into the house). (a) Assume that natural gas is pure methane and determine the volume of natural gas in cubic feet that was required to heat the house. The average temperature of the natural gas was 56 F; at this temperature and a pressure of 1 atm, natural gas has a density of 0.68 1 g/L. (b) How many gallons of LPG (liquefied petroleum gas) would be required to replace the natural gas used? Assume the LPG is liquid propane [ C3H8 : density, 0.5318 g/mL; enthalpy of combustion, 2219 Id/mo for the formation of CO2(g) and H2O(l) ] and the furnace used to burn the LPG has the same efficiency as the gas furnace. (c) What mass of carbon dioxide is produced by combustion of the methane used to heat the house? (d) What mass of water is produced by combustion of the methane used to heat the house? (e) What volume of air is required to provide the oxygen for the combustion of the methane used to heat the house? Air contains 23% oxygen by mass. The average density of air during the month was 1.22 g/L. (f) How many kilowatt—hours ( 1kWh=3.6106 J) of electricity would be required to provide the heat necessary to heat the house? Note electricity is 100% efficient in producing heat inside a house. (g) Although electricity is 100% efficient in producing heat inside a house, production and distribution of electricity is not 100% efficient. The efficiency of production and distribution of electricity produced in a coal-fired power plant is about 40%. A certain type of coal provides 2.26 kWh per pound upon combustion. What mass of this coal in kilograms will be required to produce the electrical energy necessary to heat the house if the efficiency of generation and distribution is 40%?

In a calorimetry experiment in a Chemistry for Engineers Laboratory class, a 12.9 - g sample of aluminum  is heated in a water bath until its temperature is 93 degrees Celsius. It is quickly transferred to a coffee - cup calorimeter containing 50 mL water whose temperature is 27.7 degrees Celsius. The calorimeter was covered and the final temperature of both aluminum and water was read. What is the final temperature, in Celsius, of the two substances rounded off to the second decimal place? The specific heat of aluminum and water are 0.88 J/g °C and 4.184 J/g °C, respectively.

The warmest temperature ever measured in the United States is 134 degrees farenheit on July 10,1913 in Death valley, California. convert the temperature to celcius and kelvin.

1. It is known that the boiling point of water on the Kelvin temperature scale is 373.15 K and the freezing temperature of water is 273.15 K. A temperature scale, called the Reaumur (R) scale, is defined by identifying the freezing point of water as 0.0°R and the boiling point of water as 80.0°R. What is 62.3°R on the Kelvin scale? Clearly define your variables.

Calculate the quantity of heat required to raise the temperature of 20.0 g of water from 19.1 °C to 30.6 °C. Calculate the final temperature, in degrees Celcius, when 85.0 g of water, initially at 21.7 °C, absorbs 4.41×103 J of heat. °C (do not include the temperature unit in your response as it is already specified)

Calculate the amount of heat needed to boil 189. g of water (H₂O), beginning from a temperature of 52.0 °C. Round your answer to 3 significant digits. Also, be sure your answer contains a unit symbol. 0 x10 X 3

Dennis obtained a clean, dry stoppered flask. He determined the mass of the flask and stopper to be 32.634 g.He then filled the flask with water and determined the mass of the full stoppered flask to be 59.479 g. Based on the temperature of the water, Dennis found the density of water in the Handbook of Chemistry and Physics to be 0.998730 g/mL. Calculate the volume of the flask.

Calculate the amount of heat needed to boil 126. g of water (H₂O), beginning from a temperature of 99.3 °C. Round your answer to 3 significant digits. Also, be sure your answer contains a unit symbol. Ú ☐ x10 X