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Honors Exam 10
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Honors Exam 10

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  • 1. Complete the following Gas Law Problems. Use any resources from class and show all work on a separate sheet of paper. 1. What is the pressure of a gas if you compressed the gas from its original 500 mL at 3.4 torr to a volume of 302 mL? 2. At what temperature will a gas be at if you allow it to expand from an original 456 mL at 65 °C to 3.4 L? 3. You have a gas at 453 mm Hg with a volume of 700 mL and a temperature of 25 °C, what will the temperature of the gas be, if you change the pressure to 278 mm Hg and a volume of 1200 mL? 4. If a sample of a gas occupies 6.8 L at 327°C, what will be its volume at 27°C if the pressure does not change? 5. What is the temperature of the gas inside a 750 mL balloon filled with 25g of H2 gas if the pressure of the balloon is 1.2 atm. 6. A toy balloon has an internal pressure of 1.05 atm and a volume of 5.0 L. If the temperature where the balloon is released is 200 C, what will happen to the volume when the balloon rises to an altitude where the pressure is 0.65 atm and the temperature is –150 C? 7. A small research submarine with a volume of 1.2 x 105 L has an internal pressure of 1.0 atm and an internal temperature of 150 C. If the submarine descends to a depth where the pressure is 150 atm and the temperature is 30 C, what will the volume of the gas inside be if the hull of the submarine breaks? 8. How many moles of gas does it take to occupy 120 liters at a pressure of 2.3 atmospheres and a temperature of 340K? For each question below, write increases, decreases, or stays the same. _______________________ 1. The room temperature increases from 20 ºC to 24 ºC. What happens to the pressure inside a closed cylinder of oxygen contained in the room? _______________________ 2. What happens to the pressure of the gas in an inflated expandable balloon if the temperature is increased? _______________________ 3. An aerosol can of air freshener is sprayed into a room. What happens to the pressure of the gas after it leaves the can, if its temperature stays constant? _______________________ 4. Some food is sealed in a plastic bag and placed in the refrigerator. What happens to the volume of the air in the bag? _______________________ 5. What happens to the pressure of a gas in an incandescent light bulb, a few minutes after the light is turned on?