Gas Law Test Review I. Kinetic Molecular Theory (how ideal gases behave) 1. Gas particles do ____ attract or repel 2. Gas particles have _______ volume 3. Kinetic energy is ___________________ during the elastic collisions 4. Gas particles are in _____________, random motion 5. All gases have the same ___________________ at a given temperature. 6. Real gases behave more “ideal” under ___________ pressures and ___________ temperatures. II. Gas Laws List the 4 variables and acceptable units _____________, ______________, _____________, ___________ A. Boyle’s Law 1. Temperature and moles are held _______________________ 2. Found inverse relationship between _______________ & _______________ 3. As pressure increases, volume ___________ 4. Why? 5. Equation = _______________ B. Charles’s Law 1. Pressure & moles are held ________________________ 2. Found direct relationship between ____________________ & ___________ 3. As temperature increases, volume ________________ 4. Why? 5. Equation = ________________ C. Gay-Lussac’s Law 1. Volume and moles are held ___________________ 2. Found direct relationship between ___________________ & ____________ 3. As Temperature increases, pressure _________________ 4. Why? 5. Equation = _________________ D. Avogadro’s Principle 1. Equal volumes of gases at the same ______________ & ______________ 2. Found direct relationship between _________________ & _________________ 3. As moles increases, volume ____________________ 4. Why? 5. Equation = ____________________ E. The combined Gas Law 1. Amount of Gas (moles) held ___________________ 2. Equation = ______________ F. Conversion Factors 1. Molar Volume = ______ L/mole at STP 2. STP Temperature = _____°C or ______K Pressure = ______atm 3. 1 atm = _______ kPa = __________mmHg = _________ torr = _________ psi 4. R = ____________ when using atmospheres 5. R = ____________ when using kPa G. The Ideal Gas Law 1. Equation = ________ 2. When do you use this? _________________________ H. Dalton’s Law of Partial Pressure 1. Where ___________ must be in the same unit 2. Equation = _______________ 3. When do you use this? _________________________________ IV. Mixed Review Math Practice 1. A gas system contains 3 moles of a gas and has an initial pressure and volume of 4800 torr and 6.96L. If the volume changes to 34.3L, what will the resultant pressure be? o 2. 3.0 moles of hydrogen gas has an initial volume and temperature of 6.220 L and 4.6 C. If the temperature changes to 220.0K, what will the resultant volume be in L? o 3. A gas system at -43 C has an initial pressure of 5460 mmHg with the volume unknown. When the pressure changes to 1090torr the volume is found to be 13,200mL. What was the initial volume in L? 4. A gas system has an initial volume of 11.2L with the temperature unknown. When the volume changes to o 2.95L the temperature is found to be 102.0K. What was the initial temperature in C? 5. Calculate the volume that 1.43 mol of a gas at STP will occupy. 6. 1.5 L of nitrogen gas has an initial temperature of 446.0 K with the pressure unknown. When the temperature changes to 110°C the pressure is found to be 6.88 atm. What was the initial pressure in atm? 7. A gas system has initial pressure and temperature of 152kPa and 337.4K. If the temperature changes to 643.0 K, what will the resultant pressure be in atm? 8. A certain sample of gas contains 2.00kPa of hydrogen, 3.00kPa of oxygen, and 0.500kPa of nitrogen. What is the total pressure in the container? 9. A gas that has a volume of 28 liters, a temperature of 45°C and an unknown pressure has its volume increased to 34 liters and its temperature decreased to 35°C. If I measure the pressure after the change to be 2.0 atm, what was the original pressure of the gas? 10. Calculate the volume that 3.72 mol of a gas at STP will occupy. 11. If I contain 3.0 moles of gas in a container with a volume of 60.0 liters and at a temperature of 400.0K, what is the pressure inside the container? 12. If I have 7.7 moles of gas at a pressure of 0.0900 atm and at a temperature of 56°C, what is the volume of the container that the gas is in?