A man heats a balloon in the oven.  If the balloon initially has a volume of 0.40 liters and a temperature of 20. 0C, what will the volume of the balloon be after he heats it to a temperature of 250 0C?

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%?

7.The word pour is commonly used in reference to liquids but not to solids or gases. Can you pour a solid or a gas? Why or why not? If either answer is yes, can you give an example?

2. Two students weigh a gelatin capsule (0.112g). Next they add pieces of aluminum-zinc alloy to the capsule and weigh the capsule and alloy (0.271g). They weigh out an empty beaker (141.209) and begin the experiment. After the reaction, they determine the mass of the beaker (with displaced water) to be 307.712g. The temperature of the water was 21 degrees Celsius and the barometric pressure was 745.9 mmHg. Fill the calculation section of the table on the following page.

(CONTINUED ON NEXT PAGE) 4. Let's say that the full volume of your flask is 325 ml. You heat the flask of air in a hot water bath at 89.0°C according to your thermometer. You then inverti into the cold water bath at 5.0°C Water enters the flask as the volume of the gas shrinks. a) Theoretically, what should the volume of the gas be after it sits in the cold water bath? b) You find that during your experiment that 65.0 mL of water has entered the flask. What is the experimental volume of the gas? c) What is your percent error for this measurement?

Your baby brother is toddling around the house, playing with a toy balloon. You decide to teach him something about physics, so you take the balloon away from him and hide it in the freezer. (His cries are enough to convince you that he is excited about this learning experience.) a) If the temperature inside your house is 25° Celsius, while the temperature inside the freezer is -10° Celsius, then by what percentage will the volume of the balloon change? We will take the pressure inside the balloon as constant. When you put the balloon in the refrigerator, it will shrink. (Try it and see!) c) Sketch a p-V diagram for the gas inside the balloon as it cools inside the regrigerator. Label the axes as completely as possible according to the given information.

Assume the density of air at room temperature is 1.2 g/mL. A student holding two balloons filled with gases, one balloon filled with hydrogen gas (density=0.082 g/mL) and second balloon filled with carbon dioxide gas (density 1.9 g/mL). Predict what would happen if the student releases both the balloons?

A balloon with an initial volume of 2.7 L at a temperature of 299 K is warmed to 396 K. What is its volume at 396 K? Express your answer in liters to two significant figures.

A volume of 23.5L of oxygen is 120 degrees Celsius at 6.63atm. It is changed to 2.89atm and a volume of 3.38L.  What is the new temperature ?

A 505.9 mL sample of carbon dioxide was heated to 351 K. If the volume of the carbon dioxide sample at 351 K is 755.2 mL, what was its temperature at 505.9 mL? K