University:
College Entrance Preparation
Course:
ACT Preparation (Science)
Academic year:

2019
Views:

364

Pages:

5
Author:

teespagmaxrtf

Technical Chemistry: Gas Laws Name: Match each example below with the appropriate gas property it illustrates. B 1. the fragrance of perfume spreads through the room A 2. smog forms over Atlanta during summer days C 3. a cylinder of oxygen used in a hospital D 4. the shrink wrap demonstration C 5. a balloon is inflated with helium E 6. a balloon filled with air weighs more than an empty balloon Match the variables used to describe gases to the correct unit. A 7. kPa B 8. °C C 9. mL B 10. K A 11. mm Hg A 12. atmospheres (atm) C 13. L B 14. °F Complete the following statements by writing “decreases,” “increases,” or “remains the same” on the line provided. As a gas is compressed in a cylinder: 15. its mass remains the same. 16. the number of gas molecules remains the same. 17. its pressure increases. 18. its volume decreases. 19. the distance between gas molecules decreases. 20. its density increases. 21. Boyle’s Law states that the pressure of a gas is inversely proportional to its volume. Explain that statement. (Include the correct formula and examples) As volume gets less, the molecules have less space & hit the walls of the container more often creating more pressure. Problems 21. A 7.0 liter balloon at room temperature (22°C) contains hydrogen gas. If the balloon is carried outside to where the temperature is -3.0°C, what volume will the balloon occupy? 70L 295K X 270K X=6.4L 22. A 5.0 liter tank of oxygen gas is at a pressure of 3 atm. What volume of oxygen will be available if the oxygen is used at standard pressure? (5.0L)(3atm) =V(latm) 15L 23. A 500 liter volume of helium gas is at a pressure of 750 mm Hg and has a temperature of 300K. What is the volume of the same gas at STP? (500L)(.987atm) (x) (latm) 750 mm 1 750mmHgx Latm = 760mmHg 300k 273K 0.987atm Tx=449.0854 24. Nitrogen (80 kPa), oxygen (21.0 kPa), carbon dioxide (0.03 kPa), and water vapor (2.0 kPa) are the usual atmospheric components. What is the total atmospheric pressure in kPa? 80+210 +0.03+2.0=1103.03 kpa Compete the following statements about the nature of gases as presented in the kinetic molecular theory by filling in the appropriate word (s) from the list below. kinetic energy potential energy no force pressure perfectly elastic random motion weak zero 25. Gas particles exert no force on one another. 26. Gas molecules are said to be in random motion 27. The volume of gas particles themselves is said to be Zero 28. The collisions between gas particles are • Perfectly elastic • average / Kinetic energy/ of t 29. The temperature of a gas is a measure of the average particles. of the gas